make maxPayload of websocket configurable via JAMBONES_WS_MAX_PAYLOAD

lib/utils/ws-requestor.js

@@ -187,7 +187,7 @@ class WsRequestor extends BaseRequestor {
         followRedirects: true,
         maxRedirects: 2,
         handshakeTimeout,
-        maxPayload: 8096,
+        maxPayload: process.env.JAMBONES_WS_MAX_PAYLOAD ? parseInt(process.env.JAMBONES_WS_MAX_PAYLOAD) : 24 * 1024,
       };
       if (this.username && this.password) opts = {...opts, auth: `${this.username}:${this.password}`};