feature: add nats auth

.env.example

@@ -6,9 +6,12 @@ LOCAL_CREDS_PATH="<path/to/dir>"
 
 # ORCHESTRATOR
 MONGO_URI="mongodb://<host>:<port>"
+ORCHESTRATOR_SIGNING_AUTH_NKEY_PATH="/.local/share/nats/nsc/local_creds/AUTH_ROOT_SK.nk"
+ORCHESTRATOR_ROOT_AUTH_NKEY_PATH="/.local/share/nats/nsc/local_creds/AUTH_SK.nk"
 
 # HOSTING AGENT
-HOST_CREDS_FILE_PATH = "ops/admin.creds"
 LEAF_SERVER_DEFAULT_LISTEN_PORT="4111"
-LEAF_SERVER_USER = "test-user"
-LEAF_SERVER_PW = "pw-123456789"
+HOSTING_AGENT_HOST_NKEY_PATH="<path>/host.nk"
+HOSTING_AGENT_SYS_NKEY_PATH="<path>/sys.nk"
+HPOS_CONFIG_PATH="path/to/file.config";
+DEVICE_SEED_DEFAULT_PASSWORD="device_pw_1234"