Place your private key file (for example: privateKey.pem and your certificate file from VDP (for example: cert.pem in the same directory. Generate a keystore (for example: myProject_keyAndCertBundle.p12) file as shown below.
> openssl pkcs12 -export -in cert.pem -inkey "privateKey.pem" -certfile cert.pem -out myProject_keyAndCertBundle.p12
Note: The myProject_keyAndCertBundle.p12 is only a placeholder file name. You may choose to name it anything else.