build: publish docker images to ghcr.io

.github/workflows/docker.yml

@@ -0,0 +1,26 @@
+name: publish-docker
+on:
+  workflow_dispatch:
+jobs:
+  publish:
+    name: 'Publish OIBus to ghcr.io'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Docker login to ghcr.io
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.REPO_ACCESS_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: "{{defaultContext}}:build/docker"
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            ghcr.io/optimistiksas/oibus:latest
+            ghcr.io/optimistiksas/oibus:${{ github.ref_name }}
+