Added Gitea Actions workflow files for CI/CD

.gitea/workflows/build.yaml

@@ -0,0 +1,21 @@
+name: Build Zola Website
+
+on: pull_request
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v2
+
+      - name: Set up Zola
+        uses: taiki-e/install-action@v2
+        with:
+          tool: zola@0.17.2
+
+      - name: Build Zola Website
+        run: |
+          zola build
+