Keep Caddy on pinscope_periscope after compose rename.

Pin the app bridge to the pre-rename network name and add DNS aliases
pinscope / periscope-frontend so the host proxy can reach the stack again.

docker-compose.yml

@@ -1,5 +1,7 @@
 # Canonical compose project on the VPS is "periscope" (not the GitHub
 # clone folder name "pinscope"). Bind mounts stay relative to the checkout.
+# Keep the Docker network name pinscope_periscope so host Caddy/nginx that
+# joined the pre-rename network can still reach these containers by DNS.
 name: periscope
 
 services:
@@ -28,7 +30,10 @@ services:
       - "8080:8080"
 
     networks:
-      - periscope
+      periscope:
+        aliases:
+          - periscope-backend
+          - pinscope-backend
 
   frontend:
     build:
@@ -48,9 +53,13 @@ services:
       - "3000:3000"
 
     networks:
-      - periscope
-
+      periscope:
+        aliases:
+          - periscope-frontend
+          - pinscope
+          - pinscope-frontend
 
 networks:
   periscope:
+    name: pinscope_periscope
     driver: bridge