Do not log < 500 on web sockets as errors

For example if someone spams a web socket without authentication we
should not log "forbidden".  Forbidden is normal/expected operation, not
an error.

src/node/routes/errors.ts

@@ -62,12 +62,16 @@ export const errorHandler: express.ErrorRequestHandler = async (err, req, res, n
 }
 
 export const wsErrorHandler: express.ErrorRequestHandler = async (err, req, res, next) => {
-  logger.error(`${err.message} ${err.stack}`)
   let statusCode = 500
   if (errorHasStatusCode(err)) {
     statusCode = err.statusCode
   } else if (errorHasCode(err) && notFoundCodes.includes(err.code)) {
     statusCode = HttpCode.NotFound
   }
+  if (statusCode >= 500) {
+    logger.error(`${err.message} ${err.stack}`)
+  } else {
+    logger.debug(`${err.message} ${err.stack}`)
+  }
   ;(req as WebsocketRequest).ws.end(`HTTP/1.1 ${statusCode} ${err.message}\r\n\r\n`)
 }