update README

README.md

@@ -1,18 +1,33 @@
 # Gencoder
 
-The ultimate code generator for any languages/frameworks.
+A code generator for any languages/frameworks.
 
 Applicable scenarios for gencoder:
 
 - You need to modify the generated code and the modified code will not be overwritten
+- High customization requirements for generated code
 
-## Build
+## Install
 
 ```bash
-make && CGO_ENABLED=0 go build -o gencoder cmd/gencoder/main.go
+go install github.com/DanielLiu1123/gencoder/cmd/gencoder
+```
+
+## Quick Start
+
+```shell
+docker rm -f test_mysql && docker run --name test_mysql -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=testdb -p 3306:3306 -p 33060:33060 -id mysql:latest && sleep 10 && docker exec -i test_mysql mysql -uroot -proot -e "\
+    CREATE TABLE testdb.user ( \
+        id INT AUTO_INCREMENT PRIMARY KEY, \
+        username VARCHAR(64) NOT NULL COMMENT 'Username, required', \
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT 'Record creation timestamp' \
+    ) COMMENT='User account information';"
 ```
 
-If you updated Handlebars.js version or added new helpers in `pkg/jsruntime/helpers.js`:
 ```bash
-go generate ./...
-```
+gencoder init
+```
+
+```bash
+gencoder generate
+```