Add watchtower, fixes and prepare for new caddy handling

tandoor/docker-compose.yml

@@ -3,6 +3,8 @@ services:
   web_recipes:
     image: vabene1111/recipes
     restart: always
+    labels:
+      com.centurylinklabs.watchtower.enable: true
     env_file:
       - .env
       - .secret.env
@@ -10,12 +12,14 @@ services:
       - staticfiles:/opt/recipes/staticfiles
       - nginx_config:/opt/recipes/nginx/conf.d
       - mediafiles:/opt/recipes/mediafiles
+    networks:
+      tandoor:
 
   nginx_recipes:
     image: nginx:mainline-alpine
     restart: always
-    ports:
-      - 3017:80
+    labels:
+      com.centurylinklabs.watchtower.enable: true
     env_file:
       - .env
       - .secret.env
@@ -25,8 +29,18 @@ services:
       - nginx_config:/etc/nginx/conf.d:ro
       - staticfiles:/static
       - mediafiles:/media
+    networks:
+      tandoor:
+      services:
+        aliases:
+          - tandoor
 
 volumes:
   nginx_config:
   staticfiles:
   mediafiles:
+
+networks:
+  tandoor:
+  services:
+    external: true