prod template: Use docker-hub images by default

In production environments, it is more likely for people to use the stable versions from the docker hub.
The build parameters were thus removed and the image variables uncommented.

contrib/docker/docker-compose.prod.yaml

@@ -27,10 +27,7 @@ services:
 
 
   front:
-    build:
+    image: thecodingmachine/workadventure-front:${VERSION}
-      context: ../..
-      dockerfile: front/Dockerfile
-    #image: thecodingmachine/workadventure-front:${VERSION}
     environment:
       - DEBUG_MODE
       - JITSI_URL
@@ -60,10 +57,7 @@ services:
     restart: ${RESTART_POLICY}
 
   pusher:
-    build:
+    image: thecodingmachine/workadventure-pusher:${VERSION}
-      context: ../..
-      dockerfile: pusher/Dockerfile
-    #image: thecodingmachine/workadventure-pusher:${VERSION}
     command: yarn run runprod
     environment:
       - SECRET_JITSI_KEY
@@ -85,10 +79,7 @@ services:
     restart: ${RESTART_POLICY}
 
   back:
-    build:
+    image: thecodingmachine/workadventure-back:${VERSION}
-      context: ../..
-      dockerfile: back/Dockerfile
-    #image: thecodingmachine/workadventure-back:${VERSION}
     command: yarn run runprod
     environment:
       - SECRET_JITSI_KEY
@@ -119,7 +110,7 @@ services:
     image: matthiasluedtke/iconserver:v3.13.0
     labels:
       - "traefik.http.routers.icon.rule=Host(`${ICON_HOST}`)"
-      - "traefik.http.routers.icon.entryPoints=web,traefik"
+      - "traefik.http.routers.icon.entryPoints=web"
       - "traefik.http.services.icon.loadbalancer.server.port=8080"
       - "traefik.http.routers.icon-ssl.rule=Host(`${ICON_HOST}`)"
       - "traefik.http.routers.icon-ssl.entryPoints=websecure"