Release v0.4.1 (#88)

* update README for readiness check

* optimize imports

* release v0.4.1

Author: bnusunny

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "lambda_web_adapter"
-version = "0.4.0"
+version = "0.4.1"
 authors = [
     "Harold Sun <[email protected]>",
     "David Calavera <[email protected]>",
@@ -17,7 +17,6 @@ readme = "README.md"
 exclude = ["examples"]
 
 [dependencies]
-env_logger = "0.8.3"
 http = "0.2.4"
 lambda-extension = "0.6.0"
 lambda_http = "0.6.1"

Cargo.toml

@@ -57,10 +57,12 @@ For details, please check out [the example nodejs application](examples/expressj
 
 When a new Lambda Execution Environment starts up, Lambda Web Adapter will boot up as a Lambda Extension, followed by the web application. 
 
-Lambda Web Adapter will send HTTP GET requests to the web application at `http://127.0.0.1:{READINESS_CHECK_PORT}{READINESS_CHECK_PATH}`. 
+By default, Lambda Web Adapter will send HTTP GET requests to the web application at `http://127.0.0.1:8080/`. The port and path can be customized with two environment variables: `READINESS_CHECK_PORT` and `READINESS_CHECK_PATH`.  
 
 Lambda Web Adapter will retry this request every 10 milliseconds until the web application returns a successful response (http status code 2xx) or the function times out. 
 
+In addition, you can configure the adapter to preform readiness check with TCP connect, by setting `READINESS_CHECK_PROTOCOL` to `tcp`. 
+
 After passing readiness check, Lambda Web Adapter will start Lambda Runtime and forward the invokes to the web application. 
 
 ### Configurations

README.md

@@ -1,10 +1,6 @@
 // Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 // SPDX-License-Identifier: Apache-2.0
 
-use http_body::Body as HttpBody;
-use lambda_extension::Extension;
-use lambda_http::{Body, Request, RequestExt, Response};
-use reqwest::{redirect, Client, Url};
 use std::{
     env,
     future::Future,
@@ -16,13 +12,17 @@ use std::{
     },
     time::Duration,
 };
+
+use http_body::Body as HttpBody;
+use lambda_extension::Extension;
+pub use lambda_http::Error;
+use lambda_http::{Body, Request, RequestExt, Response};
+use reqwest::{redirect, Client, Url};
 use tokio::net::TcpStream;
 use tokio::time::timeout;
 use tokio_retry::{strategy::FixedInterval, Retry};
 use tower::Service;
 
-pub use lambda_http::Error;
-
 #[derive(Debug, Clone, Copy)]
 pub enum Protocol {
     Http,