fix: lint errors

handler/middleware/security_headers.go

@@ -7,7 +7,6 @@ import (
 )
 
 func SecurityHeaders(serverSettings *types.Settings) func(http.Handler) http.Handler {
-
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			w.Header().Set("X-Content-Type-Options", "nosniff")
@@ -30,7 +29,7 @@ func SecurityHeaders(serverSettings *types.Settings) func(http.Handler) http.Han
 			w.Header().Set("Referrer-Policy", "strict-origin-when-cross-origin")
 			w.Header().Set("Strict-Transport-Security", "max-age=63072000; includeSubDomains; preload")
 
-			if r.Method == "OPTIONS" {
+			if r.Method == http.MethodOptions {
 				w.WriteHeader(http.StatusOK)
 				return
 			}