It seems all data is generated into the same folder where the binary is.
After dockerization of teeracle it is hard to keep the persistency.

Files needed to be persisted:

aes_key_sealed.bin
ed25519_key_sealed.bin
light_client_db.bin
light_client_db.bin.1
sidechain_db

I suggest introducing a new command line argument --datadir to handle docker mounts more easily.