update loglevel to str env var

cmd/q3rcon-proxy/main.go

@@ -3,7 +3,6 @@ package main
 import (
 	"fmt"
 	"os"
-	"slices"
 	"strings"
 	"time"
 
@@ -13,13 +12,16 @@ import (
 )
 
 func main() {
-	logLevel, err := getEnvInt("Q3RCON_LOGLEVEL")
+	loglevel := os.Getenv("Q3RCON_LOGLEVEL")
+	if loglevel == "" {
+		loglevel = "info"
+	}
+	level, err := log.ParseLevel(loglevel)
 	if err != nil {
-		log.Fatalf("unable to parse Q3RCON_LEVEL: %s", err.Error())
-	}
-	if slices.Contains(log.AllLevels, log.Level(logLevel)) {
-		log.SetLevel(log.Level(logLevel))
+		fmt.Fprintf(os.Stderr, "Invalid log level: %s\n", loglevel)
+		os.Exit(1)
 	}
+	log.SetLevel(level)
 
 	proxyHost := os.Getenv("Q3RCON_PROXY_HOST")
 	if proxyHost == "" {