Add OWNCLOUD_TRUSTED_DOMAINS to the Docker example

[michaelstingl]

Needed because of this change: owncloud-docker/server#340

Description

Add OWNCLOUD_TRUSTED_DOMAINS to the Docker example

Related Issue

owncloud-docker/server#340

Motivation and Context

Change in the ownCloud Docker now require to configure the trusted domains

How Has This Been Tested?

Run:

docker run --rm -d \
  --name owncloud \
  -p 18080:8080 \
  -e OWNCLOUD_TRUSTED_DOMAINS=192.168.68.64 \
  -e OWNCLOUD_APPS_ENABLE=oauth2 \
  -e ADMIN_USERNAME=admin \
  -e ADMIN_PASSWORD=admin \
  owncloud/server:latest

Then check if it works with browser:
http://192.168.68.64:18080/login

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• Added an issue with details about all relevant changes in the iOS documentation repository.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• Added changelog files for the fixed issues in folder changelog/unreleased

[hosy]

Does it make sense to add that 192.168.68.64 is a sample IP address and needs to be adopted to the own local network?

[michaelstingl]

@hosy propose a change? Add "(example)" to make it more clear?

[DeepDiver1975]

When accessing the docker container via localhost:8080 there is no need in setting up the trusted domain env var.

Why is the docker container started via 18080?

[jesmrec]

When accessing the docker container via localhost:8080 there is no need in setting up the trusted domain env var.

for mobile devices it's required. I guess 18080 is just an example as any other port.

[DeepDiver1975]

for mobile devices it's required.

why?

[jesmrec]

it's not required if you are in localhost as you stated, so, useless verbosity on my side (sorry!). In case of accessing from mobile, that env variable will add the public ip to the whitelist to access from outside of localhost (f. ex, from an mobile device).