Worked on security hardening for the geosolutions-it/MapStore2 repository by updating the Dockerfile to use a newer Tomcat base image, directly addressing external-component warnings and reducing vulnerability exposure. Focused on containerization and DevOps practices, the update maintained build and runtime compatibility without altering application code, ensuring a seamless transition for future deployments. The approach emphasized minimal changes for maximum security impact, with clear documentation and traceability to support audit requirements. By resolving a specific security issue, the work aligned with organizational security policies and prepared the project for upcoming releases, leveraging Dockerfile expertise and a methodical, policy-driven engineering process.