ci: add basic build and test workflow

Author: paulirish

.github/workflows/ci.yaml

@@ -0,0 +1,49 @@
+name: CI
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+
+jobs:
+  build:
+    name: Build and Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: web/frontend/package-lock.json
+
+      - name: Install Frontend Dependencies
+        working-directory: web/frontend
+        run: npm ci
+
+      - name: Build Frontend
+        working-directory: web/frontend
+        run: npm run build
+
+      - name: Copy Frontend Assets
+        run: |
+          # Create destination directory (files are embedded from internal/web/dist)
+          mkdir -p internal/web
+          # Copy built assets from web/frontend/dist to internal/web/dist
+          cp -r web/frontend/dist internal/web/
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.24.0'
+          cache: true
+
+      - name: Build Go Project
+        run: go build -v ./...
+
+      - name: Run Go Tests
+        run: go test -v ./...