docs: add ssh information

Author: Joe Previte

README.md

@@ -22,9 +22,28 @@ makepkg --printsrcinfo > .SRCINFO
 	- If you don't have this set up, run `git remote add aur ssh://aur@aur.archlinux.org/code-server.git`
 	- Run `git push aur`
 
+### SSH Key
+
+In order to publish updates to AUR, you'll need to have an SSH key pair setup.
+
+1. Create a config file file `~/.ssh/config`
+```text
+Host aur.archlinux.org
+	IdentityFile ~/.ssh/aur
+	User aur
+```
+2. Create a new key pair by running: 
+```shell
+ssh-keygen -f ~/.ssh/aur
+```
+3. This will create a new public key at `.ssh/aur.pub`. Copy this and add to your AUR account under [My Account](https://aur.archlinux.org/account/yourusername/edit/) > SSH Public Key
+4. You may also need to be added by the package maintainer (@coadler)
+
+Read more: https://wiki.archlinux.org/index.php/AUR_submission_guidelines
+
 ### New Maintainers
 
-If a new maintainer joins the project, please add them to the top of `PKGBUILD`
+If a new maintainer joins the project, please add them to the top of `PKGBUILD`.
 
 ### Removing Old Maintainers