Update README.md

README.md

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-# How to use
+# JupyterHub container for DSC 80
 
-1. Fork repository
-2. Edit Dockerfile
+
+How to create a release
+Go to the Releases page on github
+"Create a new release"
+Under "Choose a Tag" enter "sp23" and press enter
+Then "Publish Release"
+Or, instead of using github, push a tag "sp23" using the git command line interface: git tag sp23; git push origin sp23
+How to re-release
+Go to the Releases page
+Click the Tags tab
+Delete the tag
+Or, instead of using github, delete the tag "sp23" use the git command line interface to delete the tag: git -d sp23; git push ---delete origin sp23
+Follow instructions above to recreate the tag