Module generateSelfSignedCertificate

import generateSelfSignedCertificate from 'u-http-server/util/generateSelfSignedCertificate';

For using it you need openssl installed and accessible in $PATH

It will generate some files with openssl commands :

`openssl genrsa -out ${paths.privateKey} ${2**12}`
`openssl req -new -sha256 -key ${paths.privateKey} -out ${paths.publicKey} -subj '${subj}'`
`openssl x509 -req -in ${paths.publicKey} -signkey ${paths.privateKey} -out ${paths.certificate}`

• paths.* are temporary files, generated in your system temp folder.
• subj is /C=EN/ST=London/L=London/O=Global Security/OU=IT Department/CN=localhost total random info found on first page on internet for avoid openssl prompt when req -new

When privateKey and certificate are generated. read, store in memory, and remove from disk

and return content of files