Worked on enhancing the PostgreSQL upgrade guidance within the CSCfi/csc-user-guide repository, focusing on the End-of-Life documentation. Delivered a new feature that provided detailed instructions for upgrading PostgreSQL from version 14 to 17, aiming to reduce user errors during database migrations. Adopted an info box format to improve readability and make critical upgrade steps more accessible. Ensured that the new guidance aligned with existing documentation standards, supporting smoother transitions for users managing database upgrades. Utilized skills in PostgreSQL, database management, and Markdown to document changes clearly, maintaining traceability through well-documented commits and repository maintenance practices throughout the development process.