Add build step to the CI

.github/workflows/main.yml

@@ -0,0 +1,45 @@
+name: QA
+on: [pull_request]
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: pnpm/action-setup@v2.2.1
+        with:
+          version: 6.19.1
+      - uses: actions/setup-node@v3
+        with:
+          node-version: "16"
+          cache: "pnpm"
+      - name: Install dependencies
+        run: pnpm install
+      - name: Check linters
+        run: pnpm lint
+      - name: Validate paths
+        run: |
+          pnpm paths
+          git diff --exit-code ./lib/\$path.ts
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: pnpm/action-setup@v2.2.1
+        with:
+          version: 6.19.1
+      - uses: actions/setup-node@v3
+        with:
+          node-version: "16"
+          cache: "pnpm"
+      - uses: actions/cache@v2
+        with:
+          path: |
+            ${{ github.workspace }}/.next/cache
+          key: ${{ runner.os }}-nextjs-${{ hashFiles('**/pnpm-lock.json') }}-${{ hashFiles('**.[jt]s', '**.[jt]sx') }}
+          # If source files changed but packages didn't, rebuild from a prior cache.
+          restore-keys: |
+            ${{ runner.os }}-nextjs-${{ hashFiles('**/pnpm-lock.json') }}-
+      - name: Install dependencies
+        run: pnpm install
+      - name: Build project
+        run: pnpm build