We should add some labels and annotation keys in Dockerfile files and building configuration to make the image more standard:

• org.opencontainers.image.authors contact details of the people or organization responsible for the image.
• org.opencontainers.image.version version of the packaged software.
• org.opencontainers.image.revision git commit sha1 of the built source repo.
• org.opencontainers.image.vendor set it to PingCAP.
• org.opencontainers.image.licenses set it to Apache-2.0

Refs:

• OCI pre-defined-annotation-keys
• SPDX license expressions
  • understanding-using-spdx-license-identifiers