Document that there is a Tomcat error valve module (!22) · Merge requests · myuw / my-root · GitLab

On December 29, GitLab will be migrating to the next generation Container Registry, which implements automatic garbage collection. See KB news article for edge cases in which you could need to rebuild a container after the migration.

Edit pass through the README, acknowledging that the error valve is a thing and documenting what one does with it.