refactor: update network refs form "traefik-proxy" to "proxy"

- To allow testing dev vers of other services

penpot/compose.yaml

@@ -50,7 +50,7 @@ x-secret-key: &penpot-secret-key
 
 networks:
   penpot:
-  traefik-proxy:
+  proxy:
     external: true
 
 volumes:
@@ -98,11 +98,11 @@ services:
 
     networks:
       - penpot
-      - traefik-proxy
+      - proxy
 
     labels:
       - "traefik.enable=true"
-      - "traefik.docker.network=traefik-proxy"
+      - "traefik.docker.network=proxy"
 
       # Prod Router
       - "traefik.http.routers.penpot.rule=Host(`penpot.forust.xyz`)"