Noob Questions - How do I create users, and let new users sign up?

[runfox]

I installed roundcube, on a LAMP stack on Ubuntu 20.04, last night.

I want to enable users for my website to sign up for an email account. How do I add a link to sign up for new users to the login page?

How can I create a support email account and an admin email account?

How can i link the email server to my website with SMTP?

Do i need to add a control panel like Zpanel to create new users accounts with a GUI?

[JohnDoh]

Roundcube is a web based IMAP client. It does not have any user management functions.

How do I add a link to sign up for new users to the login page?

You can use the Plugin API to modify Roundcube.

How can I create a support email account and an admin email account?

You need to do that on your IMAP server

How can i link the email server to my website with SMTP?

You can specify the SMTP server Roundcube should use to send emails in your Roundcube config file

Do i need to add a control panel like Zpanel to create new users accounts with a GUI?

I can't really answer that, it is not related to Roundcube.

[homescriptone]

Hello,
I've been facing issues configuring Postfix on my VPS and noticed it didn't work at all.
I'm thinking to switch to Gmail SMTP, i would like to know if i can use it with Rouncube for professional emails and been able to send and receive emails.
Thank you