Merge pull request #2 from JacobusXIII/build_and_publish

Configure build and publish using GitHub Actions

.github/workflows/publish_docker_image.yml

@@ -0,0 +1,35 @@
+name: Publish Docker image
+
+on:
+  push:
+  release:
+    types: [published]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Get project version
+        id: get_project_version
+        run: |
+          VERSION=$(<VERSION)
+          echo "version=${VERSION}" >> $GITHUB_OUTPUT
+      - if: github.event_name == 'release' || endsWith(steps.get_project_version.outputs.version, '-SNAPSHOT')
+        name: Login to AERIUS Container Registry
+        uses: docker/login-action@v1 
+        with:
+          registry: nexus-docker.aerius.nl
+          username: ${{ secrets.nexus_username }}
+          password: ${{ secrets.nexus_password }}
+      - if: github.event_name == 'release' || endsWith(steps.get_project_version.outputs.version, '-SNAPSHOT')
+        name: Build and push images
+        run: |
+          export DOCKER_REGISTRY_URL=nexus-docker.aerius.nl
+
+          echo '### Generating Dockerfiles ### '
+          ./update.sh
+
+          echo '### Building and pushing images ### '
+          PUSH_IMAGES=true ./build_images.sh