Updated dev notes on maven deployment

Author: piotrszul

dev/Notes.md

@@ -21,16 +21,29 @@ to deploy:
 
 ## Release to Maven Central
 
+Pre-requisites:
+
+- pgp installed 
+- a default pgp key generated in registered in a public registry ( e.g. keys.openpgp.org)
+- `~/.m2/settting.xml` with credentials to oss.sonatype.org
+
+
     export GPG_TTY=$(tty)
     mvn -DskipTests -P release deploy
     mvn nexus-staging:release
 
-    
+Note: Snapshot releases do not require the last step (i.e. after maven deploy the should be already fully deployed)
 
 More info:  https://central.sonatype.org/pages/apache-maven.html#performing-a-release-deployment-with-the-maven-release-plugin
 
 see: `~/.m2/settting.xml for all the passwords etc`
 
+Also see: 
+
+- https://docs.github.com/en/authentication/managing-commit-signature-verification/generating-a-new-gpg-key  for how to generate a new PGP key.
+- https://keys.openpgp.org/about/usage  on how to register a pgp key in a public repository.
+- https://oss.sonatype.org/#welcome to visit the actual hosting repositories.
+
 
 ## Setting up an AWS vm for Hail compilation