When adding a plugin to Docker Redmine, if you need to install the Gem package, set the Proxy environment variable in docker-compose.yml. The problems that occurred, the contents of the investigation, and how to respond are shown. Environm…

Redmine running on Docker response when creating and updating tickets got worse, and as the problem was solved by investigating cause/workaround, write down the procedure. As a result, by setting the SMTP mail notification to Async (asynch…