Build and test on Rocky Linux 9
Rocky Linux 8 only has flask 0.12 from the OS, so we can't really natively deploy the app on RL8. We should build and test on Rocky Linux 9, for which the OS provides flask 2.0.
Rocky Linux 8 only has flask 0.12 from the OS, so we can't really natively deploy the app on RL8. We should build and test on Rocky Linux 9, for which the OS provides flask 2.0.