Best docs Cinnamon will probably ever have (#105)

docs/upload-package.md

@@ -0,0 +1,24 @@
+Devpi server endpoint (subjected to change): https://ian_devpi.promptui.dm.cinnamon.is/root/packages
+
+Install devpi-client
+
+```bash
+pip install devpi-client
+```
+
+Login to the server
+
+```bash
+devpi use <server endpoint> # set server endpoint provided above
+devpi login <user name> --password=<your password> # login
+```
+
+If you don't yet have an account, please contact Ian or John.
+
+Upload your package
+
+```bash
+devpi use <package name>\dev # choose the index to upload your package
+cd <your package directory which must contain a pyproject.toml/setup.py>
+devpi upload
+```