while migrating from one host to another i found that postgres stopped working. while starting up the same "version" i got the following error:

The database cluster was initialized with CATALOG_VERSION_NO 202005171, but the server was compiled with CATALOG_VERSION_NO 202007201.

it appears that the image: postgres:13 and postgres:13.0 is misleading and gets updated frequently and each update will break existing databases and will need to somehow get the last version of the database software running to do a pg_dump on but i'm not sure as i thought i was running 13.0.

i can see that latest may change frequently but tags with versions on them are expected to run a known version. i think it matters more when the software can't automatically migrate between minor version updates.