Update README.md

README.md

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 - [DigitalOcean Docker Droplet](https://marketplace.digitalocean.com/apps/docker), this will give you a Linux VM with Docker installed ready to go. Start with any configuration with at least 8GB of memory and up it if working with a large image.
 - [GitHub Student Developer Pack](https://education.github.com/pack)
+
+# COURSE Jupyter notebook
+
+## Automated Builds
+
+A new version of the image is built whenever the repository is updated. The tag of the build is the same as the branch. 
+
+## How to create a release
+
+First, determine on the tag to use. It's recommended to use the current quarter. The tag would be "sp23" for spring 2023.
+
+Open the [Releases](../../releases) page and click the `Create a new release` button. Enter the tag in the "Choose a Tag" field and press enter to confirm. Then click "Publish Release" to create the tag.
+
+You can also create a release using the git CLI.
+
+    git tag sp23
+    git push origin sp23
+
+## How to re-release
+
+Re-releasing is the same as making a release, except that we need to delete the existing release.
+
+Open the [Releases](../../releases) page, click the Releases tab, and delete the release.
+
+Open the [Releases](../../releases) page, click the Tags tab, and delete the tag.
+
+And for CLI users
+
+    git -d sp23
+    git push ---delete origin sp23
+
+Now that the tag and release are gone, follow the "How to create a release" instructions.