Update release procedure

docs/development/new-release-procedure.md

@@ -18,9 +18,22 @@
    - check it: `ls dist` should show two files a `.tar.gz` file and a `.whl` file
 5. _Optional_ - At this point you could do an optional test installation ([see below](#optional-test-installation))
 6. Upload to PYPI  
+   1. _One-time-only auth setup:_ Login to pypi and then in your account settings, go to the API tokens section and select "Add API token". Give it any name and select scope to project:firefly-client and create token. To save this token for later uses, make sure to create a `$HOME/.pypirc` file (or update it if you already have it) with the following:
+      ```ini
+      [distutils]
+      index-servers =
+         firefly-client #note the values here are newline-separated 
+
+      [firefly-client]
+      repository = https://upload.pypi.org/legacy/
+      username = __token__
+      password = pypi-token-you-created
+      ```
+
+   2. Upload dist to pypi using twine (with the auth setup in previous step)
       ```bash
       pip install --upgrade twine
-      twine upload dist/*
+      twine upload dist/* --repository firefly-client
       ```
 7. If any files were edited (i.e `setup.py`) 
    - `git commit - a`