I am new to Atlassian development so bear with me. Should we build the project every time using atlas-run command to see how the code is reflected when it is run? It takes a long time for the project to build itself eachtime. Is there a way to hotfix the code? Or some other alternative solution that makes this process easier
You can run atlas-debug to start an instance at Tomcat/Stash, and then on a separate console run atlas-cli, and from there pi (plugin-install) which will redeploy just your plugin without a restart.
https://developer.atlassian.com/display/DOCS/atlas-cli
You might want to read some of the docs on that site. Also, there's more of a speciic Atlassian community on their SO-like Answers site here (which is handy for searching for questions too):