README: add instructions for how to create a new release

README.md

@@ -32,3 +32,13 @@ Installing the self extracting archive to `C:\msys64`:
 # Run in a MSYS2 environment
 ./make-msys2-installer
 ```
+
+## New Release TODO List
+
+* Trigger a new nightly build via https://github.com/msys2/msys2-installer/actions/workflows/build.yml or use an existing one
+* Get all files with dates in their names, sign them and create checksum files (.sig and .sha256)
+* Create a new git tag following format: `date -I`
+* Upload the installer files to the release tag
+* Run `msys2-devtools/update-installer "$(date -I)"` on the server to copy the release from GitHub
+* Update the link, name and checksum on the main website (pointing to GitHub): https://github.com/msys2/msys2.github.io/blob/source/web/index.md
+* Update the download link and checksum for the GiHub action: https://github.com/msys2/setup-msys2/blob/master/main.js