Add notes to README

Author: Baccata

.github/workflows/build-and-test.yml

@@ -23,6 +23,6 @@ jobs:
         if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main'}}
         run: |
           echo "Tagging version: ${{ steps.install-ucm.outputs.ucm-version}}"
-          git tag v${{ steps.install-ucm.outputs.ucm-version }}
+          git tag --force v${{ steps.install-ucm.outputs.ucm-version }}
           git tag --force v1 v${{ steps.install-ucm.outputs.ucm-version }}
           git push origin --tags

README.md

@@ -22,3 +22,7 @@ A GitHub Action to install the [Unison Codebase Manager](https://www.unison-lang
 ## Outputs
 
 - `ucm-version`: version of the installed UCM (should be the latest available)
+
+## Useful information :
+  * Information with regards to the environment variables known by UCM can be found [here]
+  * As the time of writing this, there is no UI to generate API keys to interact with Unison-share. Your personal access token can be found on your local machine, in `~/.local/share/unisonlanguage/credentials.json`. That JSON file contains the access token in one of the fields.