add two networks

compose.yml

@@ -3,6 +3,9 @@ version: "3.8"
 
 services:
   app:
+    networks:
+      - backend
+      - proxy
     image: outline:v001
     command: yarn dev
     volumes:
@@ -24,14 +27,20 @@ services:
         #- "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLHost=${DOMAIN}"
   redis:
     image: redis
+    networks:
+      - backend
   postgres:
     image: postgres
+    networks:
+      - backend
     environment:
       POSTGRES_USER: user
       POSTGRES_PASSWORD: pass
       POSTGRES_DB: outline
   s3:
     image: lphoward/fake-s3
+    networks:
+      - backend
     volumes:
       - fakes3_data:/fakes3_root
     #healthcheck:
@@ -44,6 +53,7 @@ services:
 networks:
   proxy:
     external: true
+  backend:
     
 volumes:
   outline_data: