feat: Update launch configuration and docker-compose for backend debugging

.vscode/launch.json

@@ -1,13 +1,17 @@
 {
     "version": "0.2.0",
     "configurations": [
-
         {
-            "name": "Attach to Docker",
+            "name": "Attach to Backend (Docker)",
             "type": "go",
             "request": "attach",
             "mode": "remote",
-            "remotePath": "",
+            "substitutePath": [
+                {
+                    "from": "${workspaceFolder}",
+                    "to": "/app"
+                }
+            ],
             "port": 2345,
             "host": "127.0.0.1",
             "showLog": true,

docker-compose.local.yml

@@ -34,6 +34,7 @@ services:
       - caddy_data_local:/data
       - caddy_config_local:/config
       - /var/run/docker.sock:/var/run/docker.sock:ro # For local container discovery
+      - ./backend:/app/backend:ro # Mount source for debugging
       # Mount your existing Caddyfile for automatic import (optional)
       # - ./my-existing-Caddyfile:/import/Caddyfile:ro
       # - ./sites:/import/sites:ro # If your Caddyfile imports other files