Update/scheduling

[reeshavacharya]

• USE_GH_API when set to true, will query directly from GitHub. When false, will get data from the cached mappings folder.
• SCHEDULE_UPDATE when set to true, will copy the mappings folder and update the local offchain-metadata folder every 2 days. When set to false, will do nothing.
• Update health endpoint:
  • Will return last commit info (author, date, hash, message).
  • Additionally:
    • Will return next schedule date and ETA if SCHEDULE_UPDATE is true.
    • Will return response time when USE_GH_API is true.
• Update Dockerfile to copy offchain-metadata from build to production.
• Update GitHub workflow.

[mesudip]

Nicely Done