Vishnu updated the Docker image for the astronomer/ap-vendor repository to align with the latest git-sync behavior, focusing on infrastructure reliability and deployment compatibility. He modified the Dockerfile to bump git-sync to version 4.2.3-1 and introduced an ENTRYPOINT, ensuring containers run the updated synchronization process seamlessly. By updating version.txt, Vishnu maintained reproducible builds and clear version tracking. His work leveraged containerization and DevOps skills, with Dockerfile as the primary language. The changes addressed evolving requirements for source synchronization in containerized environments, providing traceable, auditable updates while ensuring that deployments remain consistent and maintainable across different environments and workflows.