SubGit is a tool for a smooth, stress-free SVN to Git migration. Create writable Git mirror of a local or remote Subversion repository and use both Subversion and Git as long as you like. You may also do a fast one-time import from Subversion to Git or use SubGit within Atlassian Stash.
SubGit is a software from http://www.subgit.com/. This image is simple way to deploy a subgit service to migrate.
Image: corfr/subgit
You need to expose your existing Git folder as the volume /repo.git.
This will start the translation using configuration stored in the myrepo.git/subgit folder:
docker run --name "subgit-myrepo" --volume /local/folder/myrepo.git:/repo.git corfr/subgit
You can use the 'post-update' Git hook to eventually upload changes.
This image does not take care of assisting the subgit configuration process for a repository. You can eventually execute directly the image to do subgit commands directly.