Self-hosting buttons on Web redirect to localhost instead of real host

[invzhi]

Describe the bug
Self-hosting rill via Docker with rill start.
If the deployed host is not localhost.
The Deploy button and Login in / Sign up button on web (right top) still redirect to localhost:9009.

To Reproduce
Self-hosting rill via rill start on another host.
Access rill web via <host>:9009.
The Deploy button and Login in / Sign up button on web (right top) redirect to localhost:9009 which is inaccessible.

Expected behavior
Should redirect to host:9009 instead of fixed localhost:9009.

Desktop (please complete the following information):

• OS: rill on Linux, access via MacOS
• Browser: firefox