Add software build GitHub action

.github/workflows/software.yml

@@ -0,0 +1,41 @@
+name: build software
+on:
+  schedule:
+    - cron: "0 0 * * 1"
+  push:
+    branches:
+      - master
+    paths:
+      - 'software/**'
+
+jobs:
+  cassandra:
+    name: "software:${{ matrix.cassandra }}"
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        cassandra:
+          - cassandra_java11_python2
+          - cassandra_java11_python3
+    steps:
+      - uses: actions/checkout@v2
+      - uses: docker/setup-buildx-action@v1
+        with:
+          version: "v0.5.1"
+          buildkitd-flags: --debug
+      - uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+      - uses: docker/build-push-action@v2
+        with:
+          context: ./software/cassandra/${{ matrix.cassandra }}
+          file: ./software/cassandra/${{ matrix.cassandra }}/Dockerfile
+          platforms: linux/amd64
+          push: true
+          tags: |
+             ghcr.io/parkervcp/software:${{ matrix.cassandra }}
+
+# Copy a job above and adjust it to enable the build of newly added software