Hi, @UB_K,
Welcome to the MongoDB Community Forums. I understand that you’re having trouble getting FLE configured with mongocryptd in a Docker container. I would suggest that you try using the libmongocrypt shared library instead. The shared library has all the same features as mongocryptd, but is much more Docker-friendly. You can find out more in Automatic Encryption Shared Library for Queryable Encryption and Install libmongocrypt.
Sincerely,
James