add actorless websocket echo example

Cargo.lock

@@ -571,6 +571,19 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "actix-ws"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "535aec173810be3ca6f25dd5b4d431ae7125d62000aa3cbae1ec739921b02cf3"
+dependencies = [
+ "actix-codec",
+ "actix-http",
+ "actix-web",
+ "futures-core",
+ "tokio 1.19.2",
+]
+
 [[package]]
 name = "actix_derive"
 version = "0.6.0"
@@ -7034,6 +7047,21 @@ dependencies = [
  "rand 0.8.5",
 ]
 
+[[package]]
+name = "websocket-echo-actorless-example"
+version = "1.0.0"
+dependencies = [
+ "actix-files",
+ "actix-web",
+ "actix-ws",
+ "awc",
+ "env_logger 0.9.0",
+ "futures-util",
+ "log",
+ "tokio 1.19.2",
+ "tokio-stream",
+]
+
 [[package]]
 name = "websocket-example"
 version = "1.0.0"