Add ssh instructions, log host key

cmd/ssh/README.md

@@ -0,0 +1,34 @@
+# URDT-USSD SSH server
+
+An SSH server entry point for the vise engine.
+
+
+## Adding public keys for access
+
+Map your (client) public key to a session identifier (e.g. phone number)
+
+```
+go run -v -tags logtrace ./cmd/ssh/sshkey/main.go -i <session_id> [--dbdir <dbpath>] <publickey_filepath>
+```
+
+
+## Create a private key for the server
+
+```
+ssh-keygen -N "" -f <privatekey_filepath>
+```
+
+
+## Run the server
+
+
+```
+go run -v -tags logtrace ./cmd/ssh/main.go -h <host> -p <port> [--dbdir <dbpath>] <privatekey_filepath>
+```
+
+
+## Connect to the server
+
+```
+ssh -T -p <port> <host>
+```