Release instructions

Author: juanignaciosl

CONTRIBUTING.md

@@ -1,3 +1,28 @@
 ## Submitting Contributions
 
 Contributions are totally welcome. However, contributors must sign a Contributor License Agreement (CLA) before making a submission. [Learn more here.](https://carto.com/contributing)
+
+## Release process
+
+1. You must be maintainer at [carto pypi repo](https://pypi.python.org/pypi/carto/).
+2. Prepare a `~/.pypirc` file:
+
+```
+[distutils]
+index-servers =
+  pypi
+  pypitest
+
+[pypi]
+username=your_username
+password=your_password
+
+[pypitest]
+username=your_username
+password=your_password
+```
+
+3. Upload the package to the test repository: `python setup.py sdist upload -r pypitest`.
+4. Install it in a new environment: `pip install --index-url=https://test.pypi.org/simple --extra-index-url=https://pypi.org/simple carto`.
+5. Test it.
+6. Release it: `python setup.py sdist upload -r pypi`.