Add metadata, update Readme

.github/workflows/build.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - main
       - 'releases/**'
+    tags:
+      - v*
   pull_request:
     branches:
       - main
@@ -39,8 +41,9 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          push: true
           tags: ${{ steps.meta.outputs.tags }}
+          annotations: ${{ steps.meta.outputs.annotations }}
+          push: true
 
     outputs:
       image: ${{ steps.meta.outputs.tags }}

.github/workflows/publish.yml

@@ -30,6 +30,7 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          annotations: ${{ steps.meta.outputs.annotations }}
+          push: true

Dockerfile

@@ -2,9 +2,19 @@
 
 FROM ${DIST}
 
-LABEL maintainer="AnHeuermann"
-LABEL description="Cross-compile C FMUs for Linux and Windows"
+# Image / OCI metadata
+LABEL maintainer "AnHeuermann"
+LABEL description "Cross-compile C FMUs for Linux and Windows"
+LABEL organization "OpenModelica"
 
+LABEL org.opencontainers.image.vendor "OpenModelica"
+LABEL org.opencontainers.image.authors "AnHeuermann"
+LABEL org.opencontainers.image.version "v1.26.0-dev"
+LABEL org.opencontainers.image.description "Cross-compile C FMUs for Linux and Windows"
+LABEL org.opencontainers.image.source "https://github.com/OpenModelica/openmodelica-crossbuild/"
+LABEL org.opencontainers.image.license "AGPL VERSION 3 OR OSMC-PL VERSION 1.8"
+
+# Copy toolchain files
 COPY toolchain/ /opt/cmake/toolchain/
 
 # Install build dependencies

README.md

@@ -64,10 +64,11 @@ cmake --build build_linux64 --target create_fmu
 
 ## Upload
 
+### Release Versions
+
 The [publish.yml][gh-publish-file] workflow will build and
 upload the Docker image to
-[OpenModelica/crossbuild][docker-hub]
-for each release.
+[OpenModelica/crossbuild][docker-hub] DockerHub for each release.
 
 To do it manually run:
 
@@ -79,6 +80,14 @@ docker image tag crossbuild:$TAG $REGISTRY/crossbuild:$TAG
 docker push $REGISTRY/crossbuild:$TAG
 ```
 
+### Development Versions
+
+The [build.yml][gh-build-file] workflow uploads all tested image versions to
+[GitHub container registry][gh-container-registry].
+
+> [!CAUTION]
+> Only download and run images you trust.
+
 ## License
 
 This repository is part of OpenModelica and licensed with
@@ -94,5 +103,7 @@ This repository is part of OpenModelica and licensed with
 [i686-w64-mingw32]: ./toolchain/i686-w64-mingw32.cmake
 [x86_64-w64-mingw32]: ./toolchain/x86_64-w64-mingw32.cmake
 [gh-publish-file]: ./.github/workflows/publish.yml
+[gh-build-file]: ./.github/workflows/build.yml
+[gh-container-registry]: https://github.com/OpenModelica/openmodelica-crossbuild/pkgs/container/crossbuild
 [docker-hub]: https://hub.docker.com/repository/docker/OpenModelica/crossbuild
 [osmc-license]: ./OSMC-License.txt