Encryption

[S010MON]

We should add two way encryption using the following steps:

1. Server provides a SERVER_PUBLIC_KEY through a /public_key route
2. Client encrypts their CLIENT_PUBLIC_KEYusing the SERVER_PUBLIC_KEY and send it to the server.
3. The server authenticates the client password.

Current State: Anyone knows the SERVER_PUBLIC_KEY but the CLIENT_PUBLIC_KEY is only known to the server

4. The server provides a SECRET_PUBLIC_KEY to the client updating the SERVER_PUBLIC_KEY so that it is only known to the client (this could be different for every client so that each client can only decrypt messages to them.

Current State: The SERVER_PUBLIC_KEY and the CLIENT_PUBLIC_KEY is are only known to the client and server respectively