feat: add multiarch docker build support

[Thunderbottom]

• Added docker build support for the following platforms:
  • amd64 (default)
  • arm64v8
  • armv6
  • armv7
• Added GOOS and GOARCH information to the buildString
• Added docker manifest details to store image architecture metadata
• Updated docker/login-action from v1 to v2
• Updated goreleaser/goreleaser-action from v2 to v4

Tested the images locally, built with goreleaser and seems to be working fine. Screenshots:

Build Images

Running Containers

Container Binary Build Info