Added ci/cd pipeline to push to dockerhub

Author: hkirat

.github/workflows/prod.yml

@@ -0,0 +1,31 @@
+name: Continuous Deployment (Prod)
+
+on:
+  push:
+    branches: [ "main" ]
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Docker login
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_SECRET }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Build and push school image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: Dockerfile
+          push: true
+          tags: 100xdevs/todo-app-week-39:${{ github.sha }}
+