Added workflow to automatically build and push docker images

.github/workflows/docker-image.yaml

@@ -0,0 +1,48 @@
+name: Docker Image CI
+
+on:
+  push:
+    branches: ["main"]
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            dertyp7/tealfire-website
+          tags: |
+            type=raw,value=latest
+            type=sha
+          flavor: |
+            latest=false
+            prefix=
+            suffix=
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}