Change file modification detection method from timestamp to hash

[itsumura-h]

• Add checksums >= 0.1.0 to basolato.nimble
• Fix port mapping in compose.yaml
• Modify src/basolato/cli/functions/serveImpl.nim
  • Import checksums/md5 instead of std/times
  • Use MD5 hash value instead of file timestamp to detect file changes
  • If any file is modified, reset fileList and recheck all files