Updated DEPLOYMENT (markdown)

DEPLOYMENT.md

@@ -8,3 +8,22 @@ These are the steps to deploy a new version of Rambox here.
 4. Release the version in Github.
 5. Go to Heroku instance and in Resources tab, disable Dynos and enable it again (if no version detected yet, we have to force it).
 6. Go to Firebase and update with the new version to notify users.
+
+# CI
+
+1. Commit all with Github desktop client.
+2. Then in Github Shell, do:
+
+```powershell
+git tag -a 0.4.2 -m " "
+git push origin master --tags
+```
+
+### Extras
+
+- To remove a tag
+
+```powershell
+git push --delete origin 0.4.2 # this remove it remotely
+git tag -d 0.4.2 # remove it locally
+```