First with mill installed

For http4s scala-native

• First install clang and llvm.
• Then build binary with mill http4s.native.nativeLink.
• Then run out/http4s/native/nativeLink.dest/out

For other modules

• First assebly module with mill <module>.assembly
• Then run java -jar -Xmx1024m out/<module>/assembly.dest/out.jar