Initial Docker image workflow (#37)

* Initial Docker image workflow

* Update version parsing

Author: lloesche

.github/workflows/docker_build.yml

@@ -0,0 +1,97 @@
+name: Build someengineering/cloud2sql Docker image
+on:
+  push:
+    tags:
+      - '*.*.*'
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  split-build:
+    name: Build split Docker images
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v3
+
+      - name: Set build platforms
+        id: platform
+        run: |
+          GITHUB_REF="${{ github.ref }}"
+          GITHUB_TAG=${GITHUB_REF##*/}
+          echo "targets=linux/amd64,linux/arm64" >> $GITHUB_OUTPUT
+          if [ "${{ github.ref_type }}" = tag ]; then
+              if [[ "$GITHUB_TAG" =~ [0-9]([ab]|rc)[0-9]* ]]; then
+                echo "latest=false" >> $GITHUB_OUTPUT
+              else
+                echo "latest=true" >> $GITHUB_OUTPUT
+              fi
+          else
+              echo "latest=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Check short commit SHA and build targets
+        run: |
+          echo ${{ steps.platform.outputs.targets }}
+          echo ${{ steps.platform.outputs.latest }}
+
+      - name: Docker metadata
+        id: metadata
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            someengineering/cloud2sql
+            ghcr.io/someengineering/cloud2sql
+          flavor: |
+            latest=${{ steps.platform.outputs.latest }}
+          tags: |
+            type=pep440,pattern={{version}}
+            type=pep440,pattern={{major}}.{{minor}}
+            type=pep440,pattern={{major}}
+            type=sha,prefix=
+            type=edge
+          labels: |
+            org.opencontainers.image.title=cloud2sql
+            org.opencontainers.image.description=Extract your infrastructure data to a SQL database. 
+            org.opencontainers.image.vendor=Some Engineering Inc.
+
+      - name: Set up QEMU
+        id: qemu
+        uses: docker/setup-qemu-action@v2
+        with:
+          platforms: arm64,amd64
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Log in to Docker Hub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USER }}
+          password: ${{ secrets.DOCKERHUB_PASS }}
+
+      - name: Log in to GitHub Container Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push cloud2sql Docker image
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: ${{ steps.platform.outputs.targets }}
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.metadata.outputs.tags }}
+          labels: ${{ steps.metadata.outputs.labels }}
+          provenance: false # Temporary workaround for https://github.com/docker/buildx/issues/1533