feat: add ghcr ci

.github/workflows/ci.yml

@@ -2,6 +2,7 @@ name: CI
 
 permissions:
   actions: write
+  packages: write
 
 on:
   push:
@@ -61,3 +62,28 @@ jobs:
       module_name: transpire
     secrets:
       TRANSPIRE_CI_PAT: ${{ secrets.TRANSPIRE_CI_PAT }}
+
+  ghcr-ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: docker/setup-buildx-action@v2
+
+      - id: metadata
+        uses: docker/metadata-action@v4
+        with:
+          images: ghcr.io/ocf/transpire
+          flavor: latest=true
+
+      - uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: docker/build-push-action@v4
+        with:
+          tags: ${{ steps.metadata.outputs.tags }}
+          labels: ${{ steps.metadata.outputs.tags }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          push: true