set loglevel in Before function

.vscode/launch.json

@@ -9,9 +9,9 @@
             "type": "go",
             "request": "launch",
             "mode": "auto",
-            "program": "${workspaceFolder}/cmd/q3rcon-proxy/main.go",
+            "program": "${workspaceFolder}/cmd/q3rcon-proxy/",
             "env": {
-                "Q3RCON_PROXY": "28961:28960",
+                "Q3RCON_PORTS_MAPPING": "28961:28960",
             }
         }
     ]

cmd/q3rcon-proxy/main.go

@@ -55,6 +55,14 @@ func main() {
 				Sources: cli.EnvVars("Q3RCON_LOGLEVEL"),
 			},
 		},
+		Before: func(ctx context.Context, cmd *cli.Command) (context.Context, error) {
+			logLevel, err := log.ParseLevel(cmd.String("loglevel"))
+			if err != nil {
+				return ctx, fmt.Errorf("invalid log level: %w", err)
+			}
+			log.SetLevel(logLevel)
+			return ctx, nil
+		},
 		Action: func(_ context.Context, cmd *cli.Command) error {
 			errChan := make(chan error)
 

cmd/q3rcon-proxy/util.go

@@ -1,18 +0,0 @@
-package main
-
-import (
-	"os"
-	"strconv"
-)
-
-func getEnvInt(key string) (int, error) {
-	s := os.Getenv(key)
-	if s == "" {
-		return 0, nil
-	}
-	v, err := strconv.Atoi(s)
-	if err != nil {
-		return 0, err
-	}
-	return v, nil
-}

debian/q3rcon-proxy.service

@@ -6,9 +6,9 @@ After=network.target
 [Service]
 Type=simple
 User=gameservers
-Environment="Q3RCON_PROXY=20000:28960;20001:28961;20002:28962"
+Environment="Q3RCON_PORTS_MAPPING=20000:28960;20001:28961;20002:28962"
 Environment="Q3RCON_HOST=0.0.0.0"
-Environment="Q3RCON_DEBUG=0"
+Environment="Q3RCON_LOGLEVEL=info"
 
 ExecStart=/usr/local/bin/q3rcon-proxy
 Restart=always