Start answering hello commands

Cargo.lock

@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "anyhow"
+version = "1.0.53"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94a45b455c14666b85fc40a019e8ab9eb75e3a124e05494f5397122bc9eb06e0"
+
 [[package]]
 name = "base64"
 version = "0.13.0"
@@ -63,10 +69,12 @@ dependencies = [
 name = "cove-server"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "cove-core",
  "futures",
  "serde_json",
  "tokio",
+ "tokio-stream",
  "tokio-tungstenite",
 ]
 
@@ -667,6 +675,17 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "tokio-stream"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50145484efff8818b5ccd256697f36863f587da82cf8b409c53adf1e840798e3"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "tokio-tungstenite"
 version = "0.16.1"