1. 实现配置文件解析

2. 实现数据库连接

vendor/gorm.io/driver/postgres/README.md

@@ -0,0 +1,31 @@
+# GORM PostgreSQL Driver
+
+## Quick Start
+
+```go
+import (
+  "gorm.io/driver/postgres"
+  "gorm.io/gorm"
+)
+
+// https://github.com/jackc/pgx
+dsn := "host=localhost user=gorm password=gorm dbname=gorm port=9920 sslmode=disable TimeZone=Asia/Shanghai"
+db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
+```
+
+## Configuration
+
+```go
+import (
+  "gorm.io/driver/postgres"
+  "gorm.io/gorm"
+)
+
+db, err := gorm.Open(postgres.New(postgres.Config{
+  DSN: "host=localhost user=gorm password=gorm dbname=gorm port=9920 sslmode=disable TimeZone=Asia/Shanghai", // data source name, refer https://github.com/jackc/pgx
+  PreferSimpleProtocol: true, // disables implicit prepared statement usage. By default pgx automatically uses the extended protocol
+}), &gorm.Config{})
+```
+
+
+Checkout [https://gorm.io](https://gorm.io) for details.