add action for build

.github/workflows/build.yml

@@ -0,0 +1,35 @@
+name: Test and Build
+
+on:
+  push:
+    branches:
+      - main
+      - add-action
+
+jobs:
+
+  ghcr-image:
+    name: Build and push GHCR image
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Login
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push to GHCR
+        run: |
+          docker build .  -t ghcr.io/pacoxu/slides-crawl:latest
+          docker push ghcr.io/pacoxu/slides-crawl:latest
+
+
+