🔧 Changed ports configuration

- The frontend docker will listen on `PORT` or 80 even inside the
  docker. It allows to run the client standalone.
- The frontend docker can now can take a `BACKEND_PORT` environment
  variable

client/docker-start.sh

@@ -3,6 +3,10 @@
 # Integrate environment variables
 sed -i "s|__BACKEND__|${BACKEND_HOST}|" \
     /etc/nginx/nginx.conf
+sed -i "s|__LISTEN_PORT__|${PORT:-80}|" \
+    /etc/nginx/nginx.conf
+sed -i "s|__BACKEND_PORT__|${BACKEND_PORT:-6666}|" \
+    /etc/nginx/nginx.conf
 sed -i "s|__BASEURL__|${BASE_URL:-/}|g" \
     /var/www/index.htm \
     /var/www/manifest.json

client/nginx.conf.docker

@@ -20,11 +20,11 @@ http {
     keepalive_timeout 65;
 
     upstream backend {
-        server __BACKEND__:6666;
+        server __BACKEND__:__BACKEND_PORT__;
     }
 
     server {
-        listen 80 default_server;
+        listen __LISTEN_PORT__ default_server;
 
         location ~ ^/api$ {
             return 302 /api/;

docker-compose.yml

@@ -36,7 +36,7 @@ services:
     volumes:
       - "${MOUNT_DATA}:/data:ro"
     ports:
-      - "${PORT}:80"
+      - "${PORT}:${PORT:-80}"
 
   sql:
     image: postgres:11-alpine