CI: Add optional sleep after build to be set by external CI variable
This sleep can be used to keep the container alive after the build so docker can be used on the build server to look arround in the build container.
Dear all, On Thursday, 4th September 2025, we will test the new disaster recovery environment. A disaster recovery test will take place between 4:00 PM and 6:00 PM CEST. Please refrain from making any changes, as they will be lost. Once testing is complete, the production environment will be restored. Thank you for your understanding.
This sleep can be used to keep the container alive after the build so docker can be used on the build server to look arround in the build container.