not work: "It always got 404 in docker container"

[koolay]

My app works in docker container, the http-proxy always response 404 http status.
However, It worked well out of container.

var httpProxy = require('http-proxy');

var target = req.query.target;
        var proxy = httpProxy.createProxyServer({});
        proxy.web(req, res, {
            target: target,
            ignorePath: true
        });