Worked on the keycloak/keycloak repository to enhance build reliability and developer onboarding by focusing on build configuration and documentation. Addressed a critical issue where unsupported JDK versions caused build failures by clarifying that only JDK 17 or JDK 21 are compatible for building Keycloak. Updated Markdown-based documentation to provide explicit guidance on setting JAVA_HOME, reducing confusion and preventing common setup errors. The technical approach centered on improving clarity and accessibility of build instructions, ensuring reproducible builds for contributors. This work did not introduce new features but resolved a key bug, emphasizing careful documentation and configuration management as core skills.