Add workflow

.github/workflows/build_docker_image.yml

@@ -0,0 +1,49 @@
+name: Build docker image
+
+on:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  Build-Docker-Image:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - id: repository_name
+        uses: ASzc/change-string-case-action@v1
+        with:
+          string: ${{ github.repository }}
+
+      -
+        name: Login to ghcr.io
+        uses: docker/login-action@v1 
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      -
+        name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        env:
+          IMAGE: ${{ steps.repository_name.outputs.lowercase }}
+        with:
+          push: true
+          tags: ghcr.io/${{ env.IMAGE }}:latest
+          context: .
+          file: ./docker/build.dockerfile
+
+      - 
+        name: Invoke deployment hook
+        uses: joelwmale/webhook-action@master
+        with:
+          url: ${{ secrets.WEBHOOK_URL }}