corrected typo in instructions for "run the server"

Keygen instructions suggestion using the folder named "cert".
Server run instructions use the folder "certs".
This change harmonizes the two to be "cert".
Merge pull request #21 from ewalk153/patch-1

corrected typo in instructions for "run the server"
Deprecate -static parameter. Embed HTML instead.
Merge pull request #25 from cloudflare/cleanup1

Deprecate -static parameter. Embed HTML instead.