Add release instructions

cleanup

Add more instructions

formatting

cleanup

formatting

RELEASE.md

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+# Making a Release of Notebook
+
+## Start from a fresh git checkout and conda environment
+
+### Set the release branch
+
+```bash
+export release_branch=master
+```
+
+### Create the git checkout
+
+```bash
+git clone git@github.com:jupyter/notebook.git
+cd notebook
+git checkout ${release_banch}
+```
+
+### Create and activate the conda environment
+
+```bash
+conda create -n notebook-release -c conda-forge jupyter
+conda activate notebook-release
+```
+
+## Perform a local dev install
+
+```bash
+pip install -ve .
+```
+
+## Install release dependencies
+
+```bash
+conda install -c conda-forge nodejs babel twine
+npm install -g po2json
+```
+
+## Update the version
+
+```bash
+vim notebook/_version.py
+git commit -am "Release $(python setup.py --version)"
+git tag $(python setup.py --version)
+```
+
+## Create the artifacts
+
+```bash
+rm -rf dist
+python setup.py sdist
+python setup.py bdist_wheel
+```
+
+## Upload the artifacts
+
+```bash
+twine check dist/* && twine upload dist/*
+```
+
+## Change back to dev version
+
+```bash
+vim notebook/_version.py
+git commit -am "Back to dev version"
+```
+
+## Push the commits and tags
+
+```bash
+git push origin ${release_branch} --tags
+```