WIP: Provide a Docker Compose example

Closes shaarli#1010

TODO:
- deploy on a VPS with an actual domain
- write a supporting deployment guide / article

See:
- https://hub.docker.com/r/jwilder/nginx-proxy/
- https://hub.docker.com/r/jrcs/letsencrypt-nginx-proxy-companion/
- https://docs.docker.com/compose/environment-variables/

Signed-off-by: VirtualTam <[email protected]>

.dockercompose/traefik.toml

@@ -0,0 +1,29 @@
+debug = false
+
+logLevel = "ERROR"
+defaultEntryPoints = ["https","http"]
+
+[entryPoints]
+  [entryPoints.http]
+  address = ":80"
+    [entryPoints.http.redirect]
+    entryPoint = "https"
+  [entryPoints.https]
+  address = ":443"
+  [entryPoints.https.tls]
+
+[retry]
+
+[docker]
+endpoint = "unix:///var/run/docker.sock"
+domain = "my-awesome-app.org"
+watch = true
+exposedByDefault = false
+
+[acme]
+email = "[email protected]"
+storage = "acme.json"
+entryPoint = "https"
+onHostRule = true
+[acme.httpChallenge]
+entryPoint = "http"

.dockerignore

@@ -4,6 +4,10 @@
 .github
 tests
 
+# Docker Compose resources
+docker-compose.env
+docker-compose.yml
+
 # Shaarli runtime resources
 cache/*
 data/*

.gitattributes

@@ -35,6 +35,7 @@ doc/**/*.json     export-ignore
 doc/**/*.md       export-ignore
 .docker/          export-ignore
 .dockerignore     export-ignore
+docker-compose.*  export-ignore
 Dockerfile*       export-ignore
 Doxyfile          export-ignore
 Makefile          export-ignore

docker-compose.env

@@ -0,0 +1,2 @@
+SHAARLI_VIRTUAL_HOST=shaarli.local
+SHAARLI_LETSENCRYPT_EMAIL=[email protected]

docker-compose.yml

@@ -0,0 +1,35 @@
+---
+version: '3'
+
+networks:
+  http-proxy:
+
+volumes:
+  shaarli-data:
+
+services:
+  shaarli:
+    image: shaarli/shaarli:master
+    build: ./
+    networks:
+      - http-proxy
+    volumes:
+      - shaarli-data:/var/www/shaarli/data
+      - $PWD/.dockercompose/traefik.toml:/traefik.toml
+      - $PWD/.dockercompose/acme.json:/acme.json
+    labels:
+      traefik.docker.network: http-proxy
+      traefik.domain: "${SHAARLI_VIRTUAL_HOST}"
+      traefik.backend: shaarli
+      traefik.frontend.rule: "Host:${SHAARLI_VIRTUAL_HOST}"
+
+  traefik:
+    image: traefik
+    ports:
+      - 80:80
+      - 443:443
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+      - /dev/null:/traefik.toml
+    labels:
+      traefik.docker.network: http-proxy