2019-07-19, Version v1.4.1

Bug fixes

• [8d678781] - get user IP from XXF first (youkunhuang)
• [fda2ad28] - resolved #324 (Zhang Kaidong)
• [5d27976e] - upgrade ws version to 7 (RobinzZH)

Code Refactoring

• [8bb067c0] - fix Dockerfile (mapleeit)
• [98762a59] - refactor some code (youkunhuang)

Other commits

• [2d2e0112] - 1.4.1 (robinzhxie)