" Though the call to dns.lookup() will be asynchronous from JavaScript's perspective, it is implemented as a synchronous call to getaddrinfo(3) that runs on libuv's threadpool. This can have surprising negative performance implications for some applications, see the UV_THREADPOOL_SIZE documentation for more information.
and from: https://nodejs.org/api/cli.html#cli_uv_threadpool_size_size"
Upgraded to FoundryVTT 9.242
The fix for nodejs.
There's a problem with CoreDNS with alpine.
" Though the call to dns.lookup() will be asynchronous from JavaScript's perspective, it is implemented as a synchronous call to getaddrinfo(3) that runs on libuv's threadpool. This can have surprising negative performance implications for some applications, see the UV_THREADPOOL_SIZE documentation for more information. and from: https://nodejs.org/api/cli.html#cli_uv_threadpool_size_size"
more here: https://medium.com/@amirilovic/how-to-fix-node-dns-issues-5d4ec2e12e95
This improved the 200 deploysments that I ran.