feat: add docker env vars start server

pkg/setting/env.go

@@ -0,0 +1,63 @@
+package setting
+
+import (
+	"github.com/unknwon/com"
+	"log"
+	"os"
+)
+
+var optionValueMap = map[string]string{}
+
+// getOptionEnvValue 获取必须声明的环境变量
+func getOptionEnvValue(key string, defaultV string) string {
+	value := os.Getenv(key)
+	result := ""
+	if value == "" {
+		result = defaultV
+	} else {
+		result = value
+	}
+	optionValueMap[key] = result
+	return result
+}
+
+// getMustEnvValue 获取必须声明的环境变量
+func getMustEnvValue(key string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		log.Printf("[message-nest] you must assign env: %s", key)
+		return ""
+	} else {
+		return value
+	}
+}
+
+// printOptionValue 打印可选环境变量值
+func printOptionValue() {
+	for key, val := range optionValueMap {
+		log.Printf("[message-nest] current option env : %s, value: %s", key, val)
+	}
+}
+
+// loadConfigFromEnv 从环境变量加载配置
+func loadConfigFromEnv() {
+	AppSetting.JwtSecret = getOptionEnvValue("JWT_SECRET", "message-nest")
+	AppSetting.LogLevel = getOptionEnvValue("LOG_LEVEL", "INFO")
+	AppSetting.InitData = getOptionEnvValue("INIT_DATA", "")
+
+	ServerSetting.RunMode = getOptionEnvValue("RUN_MODE", "release")
+	ServerSetting.HttpPort = 8000
+	ServerSetting.ReadTimeout = 60
+	ServerSetting.WriteTimeout = 60
+
+	DatabaseSetting.Type = "mysql"
+	DatabaseSetting.Host = getMustEnvValue("MYSQL_HOST")
+	DatabaseSetting.Port = com.StrTo(getMustEnvValue("MYSQL_PORT")).MustInt()
+	DatabaseSetting.User = getMustEnvValue("MYSQL_USER")
+	DatabaseSetting.Password = getMustEnvValue("MYSQL_PASSWORD")
+	DatabaseSetting.Name = getMustEnvValue("MYSQL_DB")
+	DatabaseSetting.TablePrefix = getMustEnvValue("MYSQL_TABLE_PREFIX")
+	DatabaseSetting.SqlDebug = getOptionEnvValue("SQL_DEBUG", "disable")
+
+	printOptionValue()
+}