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bunkerized-nginx

nginx Docker image secure by default.

Avoid the hassle of following security best practices each time you need a web server or reverse proxy. Bunkerized-nginx provides generic security configs, settings and tools so you don't need to do it yourself.

Non-exhaustive list of features :

  • HTTPS support with transparent Let's Encrypt automation
  • State-of-the-art web security : HTTP security headers, php.ini hardening, prevent leaks, ...
  • Integrated ModSecurity WAF with the OWASP Core Rule Set
  • Automatic ban of strange behaviors with fail2ban
  • Antibot challenge through cookie, javascript, captcha or recaptcha v3
  • Block TOR, proxies, bad user-agents, countries, ...
  • Perform automatic DNSBL checks to block known bad IP
  • Prevent bruteforce attacks with rate limiting
  • Detect bad files with ClamAV
  • Easy to configure with environment variables

Fooling automated tools/scanners :

Table of contents

Live demo

You can find a live demo at https://demo-nginx.bunkerity.com.

Quickstart guide

Run HTTP server with default settings

docker run -p 80:80 -v /path/to/web/files:/www bunkerity/bunkerized-nginx

Web files are stored in the /www directory, the container will serve files from there.

In combination with PHP

docker network create mynet
docker run --network mynet -p 80:80 -v /path/to/web/files:/www -e REMOTE_PHP=myphp -e REMOTE_PHP_PATH=/app bunkerity/bunkerized-nginx
docker run --network mynet --name=myphp -v /path/to/web/files:/app php:fpm

The REMOTE_PHP environment variable lets you define the address of a remote PHP-FPM instance that will execute the .php files. REMOTE_PHP_PATH must be set to the directory where the PHP container will find the files.

Run HTTPS server with automated Let's Encrypt

docker run -p 80:80 -p 443:443 -v /path/to/web/files:/www -v /where/to/save/certificates:/etc/letsencrypt -e SERVER_NAME=www.yourdomain.com -e AUTO_LETS_ENCRYPT=yes -e REDIRECT_HTTP_TO_HTTPS=yes bunkerity/bunkerized-nginx

Certificates are stored in the /etc/letsencrypt directory, you should save it on your local drive.
If you don't want your webserver to listen on HTTP add the environment variable LISTEN_HTTP with a no value. But Let's Encrypt needs the port 80 to be opened so redirecting the port is mandatory.

Here you have three environment variables :

  • SERVER_NAME : define the FQDN of your webserver, this is mandatory for Let's Encrypt (www.yourdomain.com should point to your IP address)
  • AUTO_LETS_ENCRYPT : enable automatic Let's Encrypt creation and renewal of certificates
  • REDIRECT_HTTP_TO_HTTPS : enable HTTP to HTTPS redirection

Behind a reverse proxy

docker run -p 80:80 -v /path/to/web/files:/www -e PROXY_REAL_IP=yes bunkerity/bunkerized-nginx

The PROXY_REAL_IP environment variable, when set to yes, activates the ngx_http_realip_module to get the real client IP from the reverse proxy.

See this section if you need to tweak some values (trusted ip/network, header, ...).

As a reverse proxy

You can setup a reverse proxy by adding your own custom configurations at server context.
For example, this is a dummy reverse proxy configuration :

location / {
	if ($host = www.website1.com) {
		proxy_pass http://192.168.42.10$request_uri;
	}

	if ($host = www.website2.com) {
		proxy_pass http://192.168.42.11$request_uri;
	}
}

All files (ending with .conf) in /server-confs inside the container will be included at server context. You can simply mount a volume where your config files are located :

docker run -p 80:80 -e SERVER_NAME="www.website1.com www.website2.com" -e SERVE_FILES=no -e DISABLE_DEFAULT_SERVER=yes -v /path/to/server/conf:/server-confs bunkerity/bunkerized-nginx

Here you have three environment variables :

  • SERVER_NAME : list of valid Host headers sent by clients
  • SERVE_FILES : nginx will not serve files from the /www directory
  • DISABLE_DEFAULT_SERVER : nginx will not respond to requests if Host header is not in the SERVER_NAME list

Antibot challenge

docker run -p 80:80 -v /path/to/web/files:/www -e USE_ANTIBOT=captcha bunkerity/bunkerized-nginx

When USE_ANTIBOT is set to captcha, every users visiting your website must complete a captcha before accessing the pages. Others challenges are also available : cookie, javascript or recaptcha (more info here).

Tutorials and examples

You will some docker-compose.yml examples in the examples directory and tutorials about bunkerized-nginx in our blog.

List of environment variables

nginx

Misc

SERVER_NAME
Values : <first name> <second name> ...
Default value : www.bunkerity.com
Sets the host names of the webserver separated with spaces. This must match the Host header sent by clients.
Useful when used with AUTO_LETSENCRYPT=yes and/or DISABLE_DEFAULT_SERVER=yes.

MAX_CLIENT_SIZE
Values : 0 | Xm
Default value : 10m
Sets the maximum body size before nginx returns a 413 error code.
Setting to 0 means "infinite" body size.

ALLOWED_METHODS
Values : allowed HTTP methods separated with | char
Default value : GET|POST|HEAD
Only the HTTP methods listed here will be accepted by nginx. If not listed, nginx will close the connection.

DISABLE_DEFAULT_SERVER
Values : yes | no
Default value : no
If set to yes, nginx will only respond to HTTP request when the Host header match a FQDN specified in the SERVER_NAME environment variable.
For example, it will close the connection if a bot access the site with direct ip.

SERVE_FILES
Values : yes | no
Default value : yes
If set to yes, nginx will serve files from /www directory within the container.
A use case to not serving files is when you setup bunkerized-nginx as a reverse proxy via a custom configuration.

DNS_RESOLVERS
Values : <two IP addresses separated with a space>
Default value : 127.0.0.11 8.8.8.8
The IP addresses of the DNS resolvers to use when performing DNS lookups.

WRITE_ACCESS
Values : yes | no
Default value : no
If set to yes, nginx will be granted write access to the /www directory.
Set it to yes if your website uses file upload or creates dynamic files for example.

ROOT_FOLDER
Values : *<any valid path to web files>
Default value : /www
The default folder where nginx will search for web files. Don't change it unless you want to make your own image.

Information leak

SERVER_TOKENS
Values : on | off
Default value : off
If set to on, nginx will display server version in Server header and default error pages.

HEADER_SERVER
Values : yes | no
Default value : no
If set to no, nginx will remove the Server header in HTTP responses.

Custom error pages

ERROR_XXX
Values : <relative path to the error page>
Default value :
Use this kind of environment variable to define custom error page depending on the HTTP error code. Replace XXX with HTTP code.
For example : ERROR_404=/404.html means the /404.html page will be displayed when 404 code is generated. The path is relative to the root web folder.

HTTP basic authentication

USE_AUTH_BASIC
Values : yes | no
Default value : no
If set to yes, enables HTTP basic authentication at the location AUTH_BASIC_LOCATION with user AUTH_BASIC_USER and password AUTH_BASIC_PASSWORD.

AUTH_BASIC_LOCATION
Values : sitewide | /somedir | <any valid location>
Default value : sitewide
The location to restrict when USE_AUTH_BASIC is set to yes. If the special value sitewide is used then auth basic will be set at server level outside any location context.

AUTH_BASIC_USER
Values : <any valid username>
Default value : changeme
The username allowed to access AUTH_BASIC_LOCATION when USE_AUTH_BASIC is set to yes.

AUTH_BASIC_PASSWORD
Values : <any valid password>
Default value : changeme
The password of AUTH_BASIC_USER when USE_AUTH_BASIC is set to yes.

AUTH_BASIC_TEXT
Values : <any valid text>
Default value : Restricted area
The text displayed inside the login prompt when USE_AUTH_BASIC is set to yes.

Reverse proxy

PROXY_REAL_IP
Values : yes | no
Default value : no
Set this environment variable to yes if you're using bunkerized-nginx behind a reverse proxy. This means you will see the real client address instead of the proxy one inside your logs. Modsecurity, fail2ban and others security tools will also then work correctly.

PROXY_REAL_IP_FROM
Values : <list of trusted IP addresses and/or networks separated with spaces>
Default value : 192.168.0.0/16 172.16.0.0/12 10.0.0.0/8
When PROXY_REAL_IP is set to yes, lets you define the trusted IPs/networks allowed to send the correct client address.

PROXY_REAL_IP_HEADER
Values : X-Forwarded-For | X-Real-IP | custom header
Default value : X-Forwarded-For
When PROXY_REAL_IP is set to yes, lets you define the header that contains the real client IP address.

PROXY_REAL_IP_RECURSIVE
Values : on | off
Default value : on
When PROXY_REAL_IP is set to yes, setting this to on avoid spoofing attacks using the header defined in PROXY_REAL_IP_HEADER.

HTTPS

Let's Encrypt

AUTO_LETS_ENCRYPT
Values : yes | no
Default value : no
If set to yes, automatic certificate generation and renewal will be setup through Let's Encrypt. This will enable HTTPS on your website for free.
You will need to redirect both 80 and 443 port to your container and also set the SERVER_NAME environment variable.

HTTP

LISTEN_HTTP
Values : yes | no
Default value : yes
If set to no, nginx will not in listen on HTTP (port 80).
Useful if you only want HTTPS access to your website.

REDIRECT_HTTP_TO_HTTPS
Values : yes | no
Default value : no
If set to yes, nginx will redirect all HTTP requests to HTTPS.

Custom certificate

USE_CUSTOM_HTTPS
Values : yes | no
Default value : no
If set to yes, HTTPS will be enabled with certificate/key of your choice.

CUSTOM_HTTPS_CERT
Values : <any valid path inside the container>
Default value :
Full path of the certificate file to use when USE_CUSTOM_HTTPS is set to yes.

CUSTOM_HTTPS_KEY
Values : <any valid path inside the container>
Default value :
Full path of the key file to use when USE_CUSTOM_HTTPS is set to yes.

Self-signed certificate

GENERATE_SELF_SIGNED_SSL
Values : yes | no
Default value : no
If set to yes, HTTPS will be enabled with a container generated self-signed certificate.

SELF_SIGNED_SSL_EXPIRY
Values : integer
Default value : 365 (1 year)
Needs GENERATE_SELF_SIGNED_SSL to work. Sets the expiry date for the self generated certificate.

SELF_SIGNED_SSL_COUNTRY
Values : text
Default value : Switzerland
Needs GENERATE_SELF_SIGNED_SSL to work. Sets the country for the self generated certificate.

SELF_SIGNED_SSL_STATE
Values : text
Default value : Switzerland
Needs GENERATE_SELF_SIGNED_SSL to work. Sets the state for the self generated certificate.

SELF_SIGNED_SSL_CITY
Values : text
Default value : Bern
Needs GENERATE_SELF_SIGNED_SSL to work. Sets the city for the self generated certificate.

SELF_SIGNED_SSL_ORG
Values : text
Default value : AcmeInc
Needs GENERATE_SELF_SIGNED_SSL to work. Sets the organisation name for the self generated certificate.

SELF_SIGNED_SSL_OU
Values : text
Default value : IT
Needs GENERATE_SELF_SIGNED_SSL to work. Sets the organisitional unit for the self generated certificate.

SELF_SIGNED_SSL_CN
Values : text
Default value : bunkerity-nginx
Needs GENERATE_SELF_SIGNED_SSL to work. Sets the CN server name for the self generated certificate.

Misc

HTTP2
Values : yes | no
Default value : yes
If set to yes, nginx will use HTTP2 protocol when HTTPS is enabled.

ModSecurity

USE_MODSECURITY
Values : yes | no
Default value : yes
If set to yes, the ModSecurity WAF will be enabled.
You can include custom rules by adding .conf files into the /modsec-confs/ directory inside the container (i.e : through a volume).

USE_MODSECURITY_CRS
Values: yes | no Default value : yes If set to yes, the OWASP ModSecurity Core Rule Set will be used. It provides generic rules to detect common web attacks.
You can customize the CRS (i.e. : add WordPress exclusions) by adding custom .conf files into the /modsec-crs-confs/ directory inside the container (i.e : through a volume). Files inside this directory are included before the CRS rules. If you need to tweak (i.e. : SecRuleUpdateTargetById) put .conf files inside the /modsec-confs/ which is included after the CRS rules.

Security headers

X_FRAME_OPTIONS
Values : DENY | SAMEORIGIN | ALLOW-FROM https://www.website.net | ALLOWALL
Default value : DENY
Policy to be used when the site is displayed through iframe. Can be used to mitigate clickjacking attacks. More info here.

X_XSS_PROTECTION
Values : 0 | 1 | 1; mode=block
Default value : 1; mode=block
Policy to be used when XSS is detected by the browser. Only works with Internet Explorer.
More info here.

X_CONTENT_TYPE_OPTIONS
Values : nosniff
Default value : nosniff
Tells the browser to be strict about MIME type.
More info here.

REFERRER_POLICY
Values : no-referrer | no-referrer-when-downgrade | origin | origin-when-cross-origin | same-origin | strict-origin | strict-origin-when-cross-origin | unsafe-url
Default value : no-referrer
Policy to be used for the Referer header.
More info here.

FEATURE_POLICY
Values : <directive> <allow list>
Default value : accelerometer 'none'; ambient-light-sensor 'none'; autoplay 'none'; camera 'none'; display-capture 'none'; document-domain 'none'; encrypted-media 'none'; fullscreen 'none'; geolocation 'none'; gyroscope 'none'; magnetometer 'none'; microphone 'none'; midi 'none'; payment 'none'; picture-in-picture 'none'; speaker 'none'; sync-xhr 'none'; usb 'none'; vibrate 'none'; vr 'none'
Tells the browser which features can be used on the website.
More info here.

COOKIE_FLAGS
Values : * HttpOnly | MyCookie secure SameSite | ...
Default value : * HttpOnly
Adds some security to the cookies set by the server.
Accepted value can be found here.

STRICT_TRANSPORT_POLICY
Values : max-age=expireTime [; includeSubDomains] [; preload]
Default value : max-age=31536000
Tells the browser to use exclusively HTTPS instead of HTTP when communicating with the server.
More info here.

CONTENT_SECURITY_POLICY
Values : <directive 1>; <directive 2>; ...
Default value : default-src 'self'; frame-ancestors 'self'; form-action 'self'; block-all-mixed-content; sandbox allow-forms allow-same-origin allow-scripts; reflected-xss block; base-uri 'self'; referrer no-referrer
Policy to be used when loading resources (scripts, forms, frames, ...).
More info here.

Blocking

Antibot

USE_ANTIBOT
Values : no | cookie | javascript | captcha | recaptcha
Default value : no
If set to another allowed value than no, users must complete a "challenge" before accessing the pages on your website :

  • cookie : asks the users to set a cookie
  • javascript : users must execute a javascript code
  • captcha : a text captcha must be resolved by the users
  • recaptcha : use Google reCAPTCHA v3 score to allow/deny users

ANTIBOT_URI
Values : <any valid uri>
Default value : /challenge
A valid and unused URI to redirect users when USE_ANTIBOT is used. Be sure that it doesn't exist on your website.

ANTIBOT_SESSION_SECRET
Values : random | <32 chars of your choice>
Default value : random
A secret used to generate sessions when `USE_ANTIBOT is set. Using the special random value will generate a random one. Be sure to use the same value when you are in a multi-server environment (so sessions are valid in all the servers).

ANTIBOT_RECAPTCHA_SCORE
Values : <0.0 to 1.0>
Default value : 0.7
The minimum score required when USE_ANTIBOT is set to recaptcha.

ANTIBOT_RECAPTCHA_SITEKEY
Values : <public key given by Google>
Default value :
The sitekey given by Google when USE_ANTIBOT is set to recaptcha.

ANTIBOT_RECAPTCHA_SECRET
Values : <private key given by Google>
Default value :
The secret given by Google when USE_ANTIBOT is set to recaptcha.

External blacklist

BLOCK_USER_AGENT
Values : yes | no
Default value : yes If set to yes, block clients with "bad" user agent.
Blacklist can be found here.

BLOCK_TOR_EXIT_NODE
Values : yes | no
Default value : yes
Is set to yes, will block known TOR exit nodes.
Blacklist can be found here.

BLOCK_PROXIES
Values : yes | no
Default value : yes
Is set to yes, will block known proxies.
Blacklist can be found here.

BLOCK_ABUSERS
Values : yes | no
Default value : yes
Is set to yes, will block known abusers.
Blacklist can be found here.

DNSBL

USE_DNSBL
Values : yes | no
Default value : yes
If set to yes, DNSBL checks will be performed to the servers specified in the DNSBL_LIST environment variable.

DNSBL_LIST
Values : <list of DNS zones separated with spaces>
Default value : bl.blocklist.de problems.dnsbl.sorbs.net sbl.spamhaus.org xbl.spamhaus.org
The list of DNSBL zones to query when USE_DNSBL is set to yes.

Custom whitelisting

USE_WHITELIST_IP
Values : yes | no
Default value : yes
If set to yes, lets you define custom IP addresses to be whitelisted through the WHITELIST_IP_LIST environment variable.

WHITELIST_IP_LIST
Values : <list of IP addresses separated with spaces>
Default value : 23.21.227.69 40.88.21.235 50.16.241.113 50.16.241.114 50.16.241.117 50.16.247.234 52.204.97.54 52.5.190.19 54.197.234.188 54.208.100.253 54.208.102.37 107.21.1.8
The list of IP addresses to whitelist when USE_WHITELIST_IP is set to yes. The default list contains IP addresses of the DuckDuckGo crawler.

USE_WHITELIST_REVERSE
Values : yes | no
Default value : yes
If set to yes, lets you define custom reverse DNS suffixes to be whitelisted through the WHITELIST_REVERSE_LIST environment variable.

WHITELIST_REVERSE_LIST
Values : <list of reverse DNS suffixes separated with spaces>
Default value : .googlebot.com .google.com .search.msn.com .crawl.yahoot.net .crawl.baidu.jp .crawl.baidu.com .yandex.com .yandex.ru .yandex.net
The list of reverse DNS suffixes to whitelist when USE_WHITELIST_REVERSE is set to yes. The default list contains suffixes of major search engines.

Custom blacklisting

USE_BLACKLIST_IP
Values : yes | no
Default value : yes
If set to yes, lets you define custom IP addresses to be blacklisted through the BLACKLIST_IP_LIST environment variable.

BLACKLIST_IP_LIST
Values : <list of IP addresses separated with spaces>
Default value :
The list of IP addresses to blacklist when USE_BLACKLIST_IP is set to yes.

USE_BLACKLIST_REVERSE
Values : yes | no
Default value : yes
If set to yes, lets you define custom reverse DNS suffixes to be blacklisted through the BLACKLIST_REVERSE_LIST environment variable.

BLACKLIST_REVERSE_LIST
Values : <list of reverse DNS suffixes separated with spaces>
Default value : .shodan.io
The list of reverse DNS suffixes to blacklist when USE_BLACKLIST_REVERSE is set to yes.

Requests limiting

USE_LIMIT_REQ
Values : yes | no
Default value : yes
If set to yes, the amount of HTTP requests made by a user will be limited during a period of time.
More info rate limiting here.

LIMIT_REQ_RATE
Values : Xr/s | Xr/m
Default value : 20r/s
The rate limit to apply when USE_LIMIT_REQ is set to yes. Default is 10 requests per second.

LIMIT_REQ_BURST
Values : <any valid integer>
Default value : 40
The number of of requests to put in queue before rejecting requests.

LIMIT_REQ_CACHE
Values : Xm | Xk
Default value : 10m
The size of the cache to store information about request limiting.

Countries

BLOCK_COUNTRY
Values : <country code 1> <country code 2> ...
Default value :
Block some countries from accessing your website. Use 2 letters country code separated with space.

PHP

Remote PHP

REMOTE_PHP
Values : <any valid IP/hostname>
Default value :
Set the IP/hostname address of a remote PHP-FPM to execute .php files. See USE_PHP if you want to run a PHP-FPM instance on the same container as bunkerized-nginx.

REMOTE_PHP_PATH
Values : <any valid absolute path>
Default value : /app
The path where the PHP files are located inside the server specified in REMOTE_PHP.

Local PHP (will be removed)

USE_PHP
Values : yes | no
Default value : no
If set to yes, a local PHP-FPM instance will be run inside the container to execute PHP files.

PHP_DISPLAY_ERRORS
Values : yes | no
Default value : no
If set to yes, PHP errors will be shown to clients. Only meaningful if USE_PHP is set to yes.

PHP_EXPOSE
Values : yes | no
Default value : no
If set to yes, the PHP version will be sent within the X-Powered-By header. Only meaningful if USE_PHP is set to yes.

PHP_OPEN_BASEDIR
Values : <directories separated with : char>
Default value : /www/:/tmp/
Limits access to files within the given directories. For example include() or fopen() calls outside the directory will fail. Only meaningful if USE_PHP is set to yes.

PHP_ALLOW_URL_FOPEN
Values : yes | no
Default value : no
If set to yes, allows using url in fopen() calls (i.e. : ftp://, http://, ...). Only meaningful if USE_PHP is set to yes.

PHP_ALLOW_URL_INCLUDE
Values : yes | no
Default value : no
If set to yes, allows using url in include() calls (i.e. : ftp://, http://, ...). Only meaningful if USE_PHP is set to yes.

PHP_FILE_UPLOADS
Values : yes | no
Default value : yes
If set to yes, allows clients to upload files. Only meaningful if USE_PHP is set to yes.

PHP_UPLOAD_MAX_FILESIZE
Values : <size in bytes> | XM
Default value : 10M
Sets the maximum file size allowed when uploading files. Only meaningful if USE_PHP is set to yes.

PHP_POST_MAX_SIZE
Values : <size in bytes> | XM
Default value : 10M
Sets the maximum POST size allowed for clients. Only meaningful if USE_PHP is set to yes.

PHP_DISABLE_FUNCTIONS
Values : <function 1>, <function 2> ...
Default value : system, exec, shell_exec, passthru, phpinfo, show_source, highlight_file, popen, proc_open, fopen_with_path, dbmopen, dbase_open, putenv, filepro, filepro_rowcount, filepro_retrieve, posix_mkfifo
List of PHP functions blacklisted separated with commas. They can't be used anywhere in PHP code. Only meaningful if USE_PHP is set to yes.

Fail2ban

USE_FAIL2BAN
Values : yes | no
Default value : yes
If set to yes, fail2ban will be used to block users getting too much "strange" HTTP codes in a period of time.
Instead of using iptables which is not possible inside a container, fail2ban will dynamically update nginx to ban/unban IP addresses.
If a number (FAIL2BAN_MAXRETRY) of "strange" HTTP codes (FAIL2BAN_STATUS_CODES) is found between a time interval (FAIL2BAN_FINDTIME) then the originating IP address will be ban for a specific period of time (FAIL2BAN_BANTIME).

FAIL2BAN_STATUS_CODES
Values : <HTTP status codes separated with | char>
Default value : 400|401|403|404|405|444
List of "strange" error codes that fail2ban will search for.

FAIL2BAN_BANTIME
Values :
Default value : 3600
The duration time, in seconds, of a ban.

FAIL2BAN_FINDTIME
Values :
Default : value : 60
The time interval, in seconds, to search for "strange" HTTP status codes.

FAIL2BAN_MAXRETRY
Values : <any positive integer>
Default : value : 15
The number of "strange" HTTP status codes to find between the time interval.

ClamAV

USE_CLAMAV_UPLOAD
Values : yes | no
Default value : yes
If set to yes, ClamAV will scan every file uploads and block the upload if the file is detected.

USE_CLAMAV_SCAN
Values : yes | no
Default value : yes
If set to yes, ClamAV will scan all the files inside the container every day.

CLAMAV_SCAN_REMOVE
Values : yes | no
Default value : yes
If set to yes, ClamAV will automatically remove the detected files.

Misc

ADDITIONAL_MODULES
Values : <list of packages separated with space>
Default value :
You can specify additional modules to install. All alpine packages are valid.

LOGROTATE_MINSIZE
Values : x | xk | xM | xG
Default value : 10M
The minimum size of a log file before being rotated (no letter = bytes, k = kilobytes, M = megabytes, G = gigabytes).

LOGROTATE_MAXAGE
Values : <any integer>
Default value : 7
The number of days before rotated files are deleted.

Create your own image

You can use bunkerity/bunkerized-nginx as a base image for your web application.
Here is a Dockerfile example :

FROM bunkerity/bunkerized-nginx

# Copy your web files to a folder
COPY ./web-files/ /opt/web-files

# Optional : add your own script to be executed on startup
COPY ./my-entrypoint.sh /entrypoint.d/my-entrypoint.sh
RUN chmod +x /entrypoint.d/my-entrypoint.sh

# Mandatory variables to make things working
ENV ROOT_FOLDER /opt/web-files
ENV PHP_OPEN_BASEDIR /opt/web-files/:/tmp/

# Optional variables
ENV MAX_CLIENT_SIZE 100m
ENV PHP_UPLOAD_MAX_FILESIZE 100M
ENV WRITE_ACCESS yes
ENV ADDITIONAL_MODULES php7-mysqli php7-json php7-session

You can have a look at bunkerized-phpmyadmin which is a secure phpMyAdmin Docker image based on bunkerized-nginx.

Include custom configurations

Custom configurations files (ending with .conf suffix) can be added in some directory inside the container :

  • /http-confs : http context
  • /server-confs : server context

You just need to use a volume like this :

docker run ... -v /path/to/http/confs:/http-confs ... bunkerity/bunkerized-nginx

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