docs: add GitHub Action example

Author: atinux

docs/content/1.docs/1.getting-started/3.deploy.md

@@ -52,6 +52,63 @@ The command will:
 ::note
 You can also install the [NuxtHub CLI](https://github.com/nuxt-hub/cli) globally with: `npm i -g nuxthub`.
 ::
+
+#### GitHub Action
+
+To deploy your project with a GitHub Action, you can use the following workflow:
+
+```yaml [.github/workflows/deploy.yml]
+name: Deploy to Cloudflare with NuxtHub Cli
+on:
+  push:
+    branches: ['main']
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v4
+        name: Install pnpm
+        with:
+          run_install: false
+      - name: Install Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'pnpm'
+      - name: Get pnpm store directory
+        shell: bash
+        run: |
+          echo "STORE_PATH=$(pnpm store path --silent)" >> $GITHUB_ENV
+      - uses: actions/cache@v4
+        name: Setup pnpm cache
+        with:
+          path: ${{ env.STORE_PATH }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
+      - name: Install dependencies
+        run: pnpm install
+      - name:  Deploy with nuxt-hub cli
+        run: npx nuxthub deploy
+        env:
+          NUXT_HUB_PROJECT_KEY: ${{ secrets.NUXT_HUB_PROJECT_KEY}}
+          NUXT_HUB_USER_TOKEN: ${{ secrets.NUXT_HUB_USER_TOKEN }}
+```
+
+You need to add the following secrets to your GitHub repository:
+- `NUXT_HUB_PROJECT_KEY`: Your project key (available in your project settings in the NuxtHub Admin or in your `.env` file if you ran `nuxthub link`)
+- `NUXT_HUB_USER_TOKEN`: Your user token available in your profile settings → Tokens in the NuxtHub Admin
+
+::tip
+We recommend to create a new user token for the Github CI so you can revoke it at any time or add an expiration date.
+::
+
+::note
+This GitHub action uses pnpm to install dependencies. If you are using npm or yarn, we recommend you to adapt the action to your needs.
+::
+
 ## Self-hosted
 
 You can deploy your project on your own Cloudflare account without using the NuxtHub Admin.