Adds github build and push workflow

.github/workflows/build-and-push.yaml

@@ -0,0 +1,63 @@
+name: Build and push feature/sea-data-cloud
+
+concurrency: 
+  group: "build-and-push_sea-data-cloud"
+  cancel-in-progress: true
+
+env:
+  TITLE: "52°North Helgoland SDN"
+  VENDOR: "52°North GmbH"
+  AUTHORS: "https://52North.org/"
+  DESCRIPTION: "Helgoland Build for Sea Data Network (SDN)"
+  LICENSE: "GPL-3.0"
+  IMAGE: 52north/helgoland-sdn
+  TAG: latest
+
+on:
+  push:
+    branches: [ feature/sea-data-cloud ]
+
+jobs:
+  build_and_push:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+        with:
+          ref: feature/sea-data-cloud
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - 
+        name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.IMAGE }}
+          labels: |
+            "org.opencontainers.image.authors=${{ env.AUTHORS }}"
+            "org.opencontainers.image.vendor=${{ env.VENDOR }}"
+            "org.opencontainers.image.description=${{ env.DESCRIPTION }}"
+            "org.opencontainers.image.title=${{ env.TITLE }}"
+            "org.opencontainers.image.licenses=${{ env.LICENSE }}"
+          tags: |
+            ${{ env.TAG }}
+      -
+        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: ${{ steps.meta.outputs.labels }}
+          cache-from: type=registry,ref=${{ env.IMAGE }}:buildcache
+          cache-to: type=registry,ref=${{ env.IMAGE }}:buildcache,mode=max
+