ci(.github): add build.yml, use in deploy.yml

Signed-off-by: Vaughn Dice <vaughn.dice@fermyon.com>

.github/workflows/build.yml

@@ -0,0 +1,34 @@
+name: Build
+
+on:
+  pull_request:
+    branches: [main]
+  workflow_call:
+
+jobs:
+  build:
+    runs-on: "ubuntu-latest"
+    env:
+      HUGO_VERSION: 0.123.0
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Hugo CLI
+        run: |
+          wget -O ${{ runner.temp }}/hugo.deb https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}/hugo_extended_${HUGO_VERSION}_linux-amd64.deb \
+          && sudo dpkg -i ${{ runner.temp }}/hugo.deb
+
+      - name: Install Node.js dependencies
+        run: npm install
+
+      - name: Build
+        run: npm run build
+
+      - name: Archive app artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: app
+          path: |
+            spin.toml
+            modules/
+            public/

.github/workflows/deploy.yml

@@ -5,7 +5,7 @@ on:
     branches:
       # TODO: rm after testing
       - feat/spin-based-deploy
-      # - main
+      - main
 
   workflow_dispatch:
 
@@ -16,10 +16,18 @@ concurrency:
   cancel-in-progress: false
 
 jobs:
+  build:
+    uses: ./.github/workflows/build.yml
+
   deploy:
     runs-on: ubuntu-latest
+    needs: build
     steps:
-      - uses: actions/checkout@v4
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: app
+          path: "${{ github.workspace }}"
 
       - name: Setup `spin`
         uses: fermyon/actions/spin/setup@v1
@@ -29,4 +37,5 @@ jobs:
       - name: Deploy to Fermyon Cloud
         uses: fermyon/actions/spin/deploy@v1
         with:
+          run_build: false
           fermyon_token: "${{ secrets.FERMYON_CLOUD_TOKEN }}"