Great!

But how to point domain1.com and domain2.com to one database as multiple companies or multiple websites?

Thank you very much for your reply! It worked.
Solved this problem for me.
But after evaluating and testing, I finally chose to deploy multiple odoo through docker to distinguish different database connections.

Hello, if you want:
- domain-A.com
- www.domain-A.com
- *.domain-A.com
​- subdomain-1.domain-A.com
​- subdomain-2.domain-A.com
Point to database A:
dbfilter = .*domain-A\.com$|^database A$|^subdomain-1\.domain-A\.com$

Use the same logic for domain B.