multi and single docker-compose deployment README update

Signed-off-by: Ismail Yenigul <ismailyenigul@gmail.com>

.examples/docker-compose/with-traefik2-postgresql-redis-multi-network/README.md

@@ -4,7 +4,9 @@
 
 ` # docker network  create --driver=bridge --attachable --internal=false traefik `
 
-2. Edit `traefik2/docker-compose.yml` for ACME email
+2. Edit `traefik2/docker-compose.yml`
+    - Change ACME email
+    - Change --providers.docker.network=traefik value if you created different network then `traefik`
 
 3. Deploy traefik