Problem: No way to install the files

Solution:
 - Install into ~/.local/bin

Problem: NGINX can't serve huge files

Solution:

 - Attempt to use `proxy_max_temp_file_size 0;`

Maybe we need to do `proxy_buffering off;` as well, but let's see if this
works.

Problem: cdup didn't work without -r, warnings

Solution:

 - Fix cdup to upload files in a flat way
 - Fix shellcheck warnings

Currently we're doing the following:

 - Make `cdn` directory in the project
 - `cdup cdn` when needed

Problem: sr.ht complains about lack of license

Solution:

 - Add WTFPL

Problem: No systemd service or nginx conf

Solution:

Use heredocs to populate service file (enabling it later) and adding CDN
to list of enabling sites (restarting nginx)

Problem: No way to swiftly deploy CDNs

Solution:

 Make three scripts:

  - One to upload a file to a CDN
  - One to init dot CDN config
  - One to start a CDN locally