backend for shree

Environment Variables need -

1. BACKEND_SERVER_ADDR = Contains addr of backend server
2. CA_SERVER_ADDR = Contains addr of ca server
3. REDIS_SERVER_ADDR = Contains address of local redis server

Usage:

-baddr string (required) Addrs to start backend server -caddr string (required) Addrs to CA server -logdir string Directory for server logs (default "App Directory") -raddr string (required) Addrs to the redis server