Fix devcontainer up workflow

Author: gildesmarais

.devcontainer/README.md

@@ -7,7 +7,7 @@ Containers extension) or GitHub Codespaces and use that environment for all work
 
 The devcontainer starts one service named `app` and exposes:
 
-- **Port 3000:** Ruby app
+- **Port 3001:** Ruby app (forwarded from container port 3000)
 - **Port 4321:** Astro dev server
 
 The repo is mounted at `/workspace`. Bundler gems are cached in a Docker volume to speed up
@@ -23,6 +23,9 @@ make setup
 
 This installs Ruby and frontend dependencies inside the container.
 
+If setup fails due to missing network access (e.g., GitHub DNS), rerun `make setup` once
+network access is available.
+
 ## Common commands (run inside the container)
 
 ```

.devcontainer/devcontainer.json

@@ -27,9 +27,9 @@
       }
     }
   },
-  "forwardPorts": [3000, 4321],
+  "forwardPorts": [3001, 4321],
   "portsAttributes": {
-    "3000": {
+    "3001": {
       "label": "Ruby App",
       "onAutoForward": "notify"
     },
@@ -38,6 +38,6 @@
       "onAutoForward": "silent"
     }
   },
-  "postCreateCommand": "make setup",
+  "postCreateCommand": "bash -lc \"make setup || (echo 'make setup failed; rerun once network access is available.' && exit 0)\"",
   "remoteUser": "vscode"
 }

.devcontainer/docker-compose.yml

@@ -9,7 +9,7 @@ services:
       - ../:/workspace:cached
       - bundle-cache:/usr/local/bundle
     ports:
-      - "3000:3000"
+      - "3001:3000"
     environment:
       - RACK_ENV=development
       - BUNDLE_PATH=/usr/local/bundle

README.md

@@ -64,6 +64,8 @@ bundle exec rubocop -F
 bundle exec rspec
 ```
 
+Dev Container app URL: `http://localhost:3001`.
+
 ## Frontend Development
 ```
 cd frontend