add workflow to build and push docker container

.github/workflows/docker-image.yml

@@ -0,0 +1,31 @@
+name: Build and Push Docker Container
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: Build and push Docker image for latest tag
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: true
+          tags: daniel156161/pfsense-backup:latest
+          platforms: linux/amd64