[27Dec2024 18:44:29.284] [main/ERROR] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/SCAN]: Locator {mods folder locator at /home/container/mods} found an invalid mod file net.minecraftforge.fml.loading.moddiscovery.ModFileInfo@5c41d037
net.minecraftforge.fml.loading.moddiscovery.InvalidModFileException: Invalid modId found : imfast-FORGE-1.21.4 (imfast-FORGE-1.21.4-1.0.2.jar)

Looks like the mods.toml modid has the version in the ID imfast-FORGE-1.21.4, and it shouldn't. It should just be imfast.

done