HTTPS
Step 1: Get a certificate
Step 2: Create a PKCS12 file containing full chain and private key
openssl pkcs12 -export -in fullchain.pem -inkey privkey.pem -out pkcs.p12 -name NAME
Step 3: Convert PKCS12 to keystore file
keytool -importkeystore -deststorepass PASSWORD_STORE -destkeypass PASSWORD_KEYPASS -destkeystore keystore.jks -srckeystore pkcs.p12 -srcstoretype PKCS12 -srcstorepass STORE_PASS -alias NAME