🐳 Pushing to the GitLab Container Registry

Follow these steps to push your Docker images to our self-hosted GitLab instance.

Open https://dockerdex.umcn.nl
Click “Sign in with GitHub”
Complete your profile if prompted

📦 2. Set up your project

If your Docker image is tied to a GitHub repository:

Go to “New Project” → “Import Project” → “GitHub”
Paste your GitHub Personal Access Token (PAT) with at least the repo scope
Select your project to import

If your project doesn't exist on GitHub:

If you plan to attach code to this project, consider creating it on GitHub first and then importing it into GitLab. This ensures everything is tracked in one place.
If this project is only for storing Docker images and has no code attached, feel free to create a blank project directly in GitLab:
Go to “New Project”
Create a blank project with the appropriate name

🔐 3. Log in to the GitLab Container Registry

Run:

docker logout dockerdex.umcn.nl:5005 # reset previously stored credentials
docker login dockerdex.umcn.nl:5005

Username: your GitLab username
Password: your GitLab Personal Access Token with read_registry and write_registry scopes

🏷️ 4. Tag your Docker image

docker tag <local-image-name> dockerdex.umcn.nl:5005/<username>/<project-name>:<tag>

Example:

docker tag my-slide2vec-image dockerdex.umcn.nl:5005/clemsgrs/slide2vec:1.0

📤 5. Push your image

docker push dockerdex.umcn.nl:5005/<username>/<project-name>:<tag>

You’ll find it under Packages & Registries → Container Registry in your GitLab project.
We recommend you pin the Container Registry in your side bar so you can find it more easily next time.

🧠 Notes

Use a PAT, not your password, to authenticate
Make sure the PAT has write_registry permission
You can only push to projects you own or have Maintainer access to