This commit will also allow Caddy to properly generate certs
with longer lifetimes than 12 hours, and by default it has been set to 1
month. This commit removes the pre-generated certs for safety reasons.
This commit also updates the README.md thoroughly with some
guides about the certs and how to use the role in general.
This commit includes the pre-generated certs in the files/certs
directory. README.md was thoroughly updated to include an example of
using certbot with this role and how to import the root.crt to Firefox.
