- Enable all source maps in dev build
- Disable all source maps in prod build
- Provide `ENABLE_SOURCEMAP` env var to override it.
I think the strange error seen in
https://github.com/go-gitea/gitea/issues/24784 is sourcemap related, so
if we enable/disable them all, it might go away. But it's most
definitely a Safari bug.
With all sourcemaps disabled, binary size goes down by around 1-2 MB,
with all enabled it goes up by around 12MB. If +12MB is acceptable, we
could also always enable them by default as fully source maps do have
some debugging benefits.
