[CI] GHCR and docker image updates (#219)

.github/workflows/ci.yml

@@ -496,10 +496,14 @@ jobs:
       run: |
         ./scripts/ci-update-homebrew-tap.sh
 
-  docker:
-    needs: [tag, ci]
+  ghcr:
+    if: ${{ startsWith(github.ref, 'refs/tags/v') }}
+    needs: [tag]
     runs-on: ubuntu-latest
 
+    permissions:
+      packages: write
+
     env:
       TAG: ${{ needs.tag.outputs.TAG }}
 
@@ -515,7 +519,6 @@ jobs:
 
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v3
-      if: ${{ startsWith(github.ref, 'refs/tags/v') }}
       with:
         registry: ghcr.io
         username: ${{ github.repository_owner }}
@@ -525,7 +528,7 @@ jobs:
       uses: docker/build-push-action@v6
       with:
         platforms: linux/amd64
-        push: false
+        push: true
         tags: |
-          zsv:${{ env.TAG }}
-          zsv:latest
+          ghcr.io/liquidaty/zsv:${{ env.TAG }}
+          ghcr.io/liquidaty/zsv:latest

README.md

@@ -211,6 +211,27 @@ Please note:
 - If you'd like to use additional parser features, or use the CLI as a Node
   package, please feel free to post a request in an issue here.
 
+#### GHCR (GitHub Container Registry)
+
+`zsv` CLI also is available as a container image from
+[Packages](https://github.com/liquidaty?tab=packages).
+
+The container image is published on every release. In addition to the specific
+release tag, the image is also tagged as `latest` i.e. `zsv:latest` always
+points the latest released version.
+
+Example:
+
+```shell
+$ docker pull ghcr.io/liquidaty/zsv
+# ...
+$ cat worldcitiespop_mil.csv | docker run -i ghcr.io/liquidaty/zsv count
+1000000
+```
+
+For image details, see [Dockerfile](./Dockerfile). You may use this as a
+baseline for your own use cases as needed.
+
 ### From source
 
 See [BUILD.md](BUILD.md) for more details.