Store certificate in PEM, fixed keys PEM type

handler/generate_certificate.go

@@ -116,7 +116,14 @@ func generateCertificate(publicKeyBytes []byte, caCertFilePath string, caPrivate
 		return nil, err
 	}
 
-	return certificateBytes, nil
+	certificatePemBlock := &pem.Block{
+		Type:  "CERTIFICATE",
+		Bytes: certificateBytes,
+	}
+
+	certificatePemBytes := pem.EncodeToMemory(certificatePemBlock)
+
+	return certificatePemBytes, nil
 }
 
 func readPrivateKeyFromFile(fileName string) (*rsa.PrivateKey, error) {