add github actions workflow

Author: josefhandl

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

@@ -0,0 +1,32 @@
+name: Build and Push Scaphandre Docker Image
+
+on:
+  push:
+    branches:
+      - cerit-fork
+      - gh-actions
+
+env:
+  IMAGE_NAME: "scaphandre/scaphandre"
+
+permissions:
+  packages: write
+  contents: read
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker registry
+        run: echo "${{ secrets.REGISTRY_TOKEN }}" | docker login ${{ secrets.REGISTRY_URL }} -u "${{ secrets.REGISTRY_USERNAME }}" --password-stdin
+
+      - name: Build Docker image
+        run: docker build -t ${{ secrets.REGISTRY_URL }}/${{ env.IMAGE_NAME }}:latest .
+
+      - name: Push Docker image
+        run: docker push ${{ secrets.REGISTRY_URL }}/${{ env.IMAGE_NAME }}:latest
+