docs: adapt contribution guide

.devcontainer/devcontainer.json

@@ -1,8 +1,5 @@
-// For format details, see https://aka.ms/devcontainer.json. For config options, see the
-// README at: https://github.com/devcontainers/templates/tree/main/src/typescript-node
 {
   "name": "pocket-id",
-  // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
   "image": "mcr.microsoft.com/devcontainers/typescript-node:1-22-bookworm",
   "features": {
     "ghcr.io/devcontainers/features/go:1": {}
@@ -11,21 +8,14 @@
     "vscode": {
       "extensions": [
         "golang.go",
-        "svelte.svelte-vscode"
+        "svelte.svelte-vscode",
+        "bradlc.vscode-tailwindcss",
+        "esbenp.prettier-vscode"
       ]
     }
   },
-  // Use 'postCreateCommand' to run commands after the container is created.
-  // Install npm dependencies for the frontend.
-  "postCreateCommand": "npm install --prefix frontend"
-
-
-  // Features to add to the dev container. More info: https://containers.dev/features.
-  // "features": {},
-  // Use 'forwardPorts' to make a list of ports inside the container available locally.
-  // "forwardPorts": [],
-  // Configure tool-specific properties.
-  // "customizations": {},
-  // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
-  // "remoteUser": "root"
-}
+  "containerEnv": {
+    "HOST": "0.0.0.0"
+  },
+  "postCreateCommand": "npm install --prefix frontend && cd backend && go mod download"
+}