Add documentation and integration for iPXE code signing
Add documentation and integration for iPXE codesigning using a keypair that is provided as a secret "file" variable in gitlab CI.
After or before this is merged a key pair can be added for the variables SECRET_CODESIGNING_CERT_FILE
and SECRET_CODESIGNING_KEY_FILE
using the provided script (which generates a codesigning key pair, that is valid for 365 days).
The build will fail if the provided codesigning certificate is valid for less than 90 days.
Closes #7 (closed)
Edited by David Runge