How to create multiple websites? One is based on python flask, another is based on nodejs, and one more is a static web site?

[xiaotusoushu]

I just viewed the document about heliohost flask/node, and I know the steps to create flask/node application on helio server,  but now what i need to do firstly? Need 3 different sub domains?

Thanks a lot.

[MoneyBroz]

We need to add rhe subdomains manually to your account. Which subdomains would you like added?

[xiaotusoushu]

My hosting account username: xiaotusoushu

I would like to add this following subdomains:

• zanzhu
• test
• files