Use 2048 bit RSA keys for OpenSSL 1.1.1

Generate_Certificates.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 mkdir certificates
-openssl req -x509 -nodes -days 365 -newkey rsa:1024 -keyout certificates/server_jupyter_based.crt.key -out certificates/server_jupyter_based.crt.pem
+openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout certificates/server_jupyter_based.crt.key -out certificates/server_jupyter_based.crt.pem