Condense copyright information
Use single backticks, not triple
Remove links at end of README.md
Linkify title and add tagline to README.md
Clarify that this is a regex
Fix no period at end of sentence
Clarify systemd, nginx, and letsencrypt usage
Describe valid file names using regex
De-capitalize headings
Remove NAME heading
Add information about group
Move optional shell to its own line
Add tmp-login

This script is being used for testing.
Blockquote reference to the tmp service
Move project information to the end of README.md
Put setup instructions into a separate file
Add COPYRIGHT section
Use NAME header