Rebuild Readme.md and fix some typos

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lcs-png-diff-server"
-version = "0.1.3"
+version = "0.1.4"
 edition = "2021"
 documentation = "https://github.com/jianliao/lcs-png-diff-server-rs"
 homepage = "https://github.com/jianliao/lcs-png-diff-server-rs"

README.md

@@ -1,50 +1,97 @@
 # lcs-png-diff-server
-Pass in before and after bitmap URL, then the server will generate lcs diff png and return the diff result URL in response.
+Pass in before and after bitmap URL, and then the server will generate LCS diff png and return the diff result URL in response.
 
-## Server start options
+## Getting Started
 
-### Start server
+### Install and start server
 
 ``` bash
-lcs-png-diff-server
-```
-or
-``` bash
-docker run --rm -it -p 8080:8080 jianliao/lcs-png-diff-server:latest
-```
-
-### Customize response URL
+$ cargo install lcs-png-diff-server
 
-``` bash
-HOST_INFO=https://localhost:443/ lcs-png-diff-server 
-```
-or
-``` bash
-docker run --rm -it -e HOST_INFO=https://localhost:443/ -p 8080:8080 jianliao/lcs-png-diff-server:latest
+$ lcs-png-diff-server
 ```
 
-## Example Request and Response
-
-### Request payload
+### Request
 
 ``` bash
 curl \
   -d '{
-        "before_png": "http://localhost:3000/fixtures/slider.png",
-        "after_png": "http://localhost:3000/fixtures/slider_after.png"
+        "before_png": "https://jianliao.github.io/lcs-test-pngs/before.png",
+        "after_png": "https://jianliao.github.io/lcs-test-pngs/after.png"
       }' \
   -H 'Content-Type: application/json' \
   -X POST http://localhost:8080/api/diff
 ```
 
-### Response payload
+### Example response payload
 
 ``` json
 {
   "result_url": "http://localhost:8080/assets/b02d9094-bc6c-4c40-923e-50c66bcf1951.png"
 }
 ```
 
+## Server startup options
+
+``` bash
+$ lcs-png-diff-server --help
+lcs-png-diff-server 
+A server for generating diff bitmaps from png files
+
+USAGE:
+    lcs-png-diff-server [OPTIONS]
+
+OPTIONS:
+    -a, --addr <ADDR>                set the listen addr [default: 0.0.0.0]
+    -h, --help                       Print help information
+    -l, --log <LOG_LEVEL>            set the log level [default: info]
+    -p, --port <PORT>                set the listen port [default: 8080]
+        --static-dir <STATIC_DIR>    set the directory where static files are to be found [default:
+                                     ./assets]
+```
+
+### Customize the hostname of the response URL
+
+You can customize the hostname of the diff result URL by setting the `HOST_INFO` environment variable.
+
+``` bash
+HOST_INFO=https://localhost:443/ lcs-png-diff-server 
+```
+
+## Docker
+
+[jianliao/lcs-png-diff-server](https://hub.docker.com/repository/docker/jianliao/lcs-png-diff-server) is a demo-only docker image. CORS had enabled for GET and POST.
+
+### Start server
+
+``` bash
+$ docker run --rm -it -p 8080:8080 jianliao/lcs-png-diff-server:0.1.4
+```
+
+### Print CLI help
+
+``` bash
+$ docker run --rm -it jianliao/lcs-png-diff-server:0.1.4 --help
+```
+
+### Change port number
+
+``` bash
+$ docker run --rm -it -p 3000:3000 jianliao/lcs-png-diff-server:0.1.4 -p 3000
+```
+
+### Change log level
+
+``` bash
+$ docker run --rm -it -p 8080:8080 jianliao/lcs-png-diff-server:0.1.4 -l debug
+```
+
+### Customize response URL
+
+``` bash
+$ docker run --rm -it -e HOST_INFO=https://domainname/ -p 8080:8080 jianliao/lcs-png-diff-server:0.1.4
+```
+
 ## LICENSE
 
-Apache License Version 2.0
+Apache License Version 2.0

src/main.rs

@@ -25,8 +25,8 @@ use uuid::Uuid;
 
 #[derive(Parser, Debug)]
 #[clap(
-    name = "lcs-diff-server",
-    about = "A server for generating diff bitmap from png files"
+    name = "lcs-png-diff-server",
+    about = "A server for generating diff bitmaps from png files"
 )]
 struct Opt {
     /// set the log level