Warning in log about couldn't wreite and update cache files

[ngocphamm]

I'm using latest version installed on macOS 14.1.1, using brew, and run as a brew service. Things work well for me but I've been noticing those warnings in the log file. I can't remember how far in the past it had happened.

[2023-11-09 06:55:29] [NOTICE] dnscrypt-proxy 2.1.5
[2023-11-09 06:55:29] [NOTICE] Network connectivity detected
[2023-11-09 06:55:29] [NOTICE] Dropping privileges
[2023-11-09 06:55:29] [NOTICE] Network connectivity detected
[2023-11-09 06:55:29] [NOTICE] Now listening to 127.0.0.1:53 [UDP]
[2023-11-09 06:55:29] [NOTICE] Now listening to 127.0.0.1:53 [TCP]
[2023-11-09 06:55:29] [NOTICE] Now listening to [::1]:53 [UDP]
[2023-11-09 06:55:29] [NOTICE] Now listening to [::1]:53 [TCP]
[2023-11-09 06:55:29] [NOTICE] Service is not usable yet
[2023-11-09 06:55:29] [NOTICE] Resolving server host [raw.githubusercontent.com] using bootstrap resolvers over udp
[2023-11-09 06:55:29] [WARNING] Couldn't write cache file [public-resolvers.md]: open sf-wlicts6ojhrefe2g.tmp: permission denied
[2023-11-09 06:55:29] [WARNING] Couldn't update cache file [public-resolvers.md]: chtimes public-resolvers.md: no such file or directory
[2023-11-09 06:55:29] [NOTICE] Source [public-resolvers] loaded
[2023-11-09 06:55:29] [NOTICE] Service is not usable yet
[2023-11-09 06:55:29] [NOTICE] Resolving server host [download.dnscrypt.info] using bootstrap resolvers over udp
[2023-11-09 06:55:30] [WARNING] Couldn't write cache file [relays.md]: open sf-qwblvjklk2jdi3uy.tmp: permission denied
[2023-11-09 06:55:30] [WARNING] Couldn't update cache file [relays.md]: chtimes relays.md: no such file or directory
[2023-11-09 06:55:30] [NOTICE] Source [relays] loaded
[2023-11-09 06:55:31] [NOTICE] Firefox workaround initialized

I think it's somewhat related to this issue #1265, but I don't know where those public-resolvers.md and relays.md files are supposed to be written to (at least on macOS), so I can't check if it has proper permissions or not.

I do have user_name = 'nobody' in the dnscrypt-proxy.toml file so I'm wondering if that's the issue. I also have to run the service with sudo brew services ... to gain the access to port 53.