generateKeys.mjs

import { exportJWK, exportPKCS8, generateKeyPair } from 'jose'

const keys = await generateKeyPair('RS256')
const privateKey = await exportPKCS8(keys.privateKey)
const publicKey = await exportJWK(keys.publicKey)
const jwks = JSON.stringify({ keys: [{ use: 'sig', ...publicKey }] })

process.stdout.write(`JWT_PRIVATE_KEY="${privateKey.trimEnd().replace(/\n/g, ' ')}"`)
process.stdout.write('\n')
process.stdout.write(`JWKS=${jwks}`)
process.stdout.write('\n')