Add travis ci

.travis.yml

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+language: node_js
+node_js: lts/*
+
+branches:
+  only:
+    - master
+
+before_deploy:
+  - export TRAVIS_TAG=${TRAVIS_TAG:-$(date +'%Y%m%d')-$(git log --format=%h -1)}
+  - git tag $TRAVIS_TAG
+
+script: npm run build; [ -d dist/public ] && cp INSTALL.md dist && zip -r dist.zip dist
+
+deploy:
+  providers: releases
+  api_key: "$GITHUB_OAUTH_TOKEN"
+  file: dist.zip
+  skip_cleanup: true
+  overwrite: true

INSTALL.md

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+Setup:
+
+1. Extrace all files.
+2. Open Web UI Options dialog, Set "Files location" of "alternative Web UI" to this folder(without `public` suffix).
+
+========
+
+安装说明：
+
+1. 解压所有文件。
+2. 打开 Web 用户界面的设置，将 “使用备用 Web UI” 的 “文件路径” 设置为本目录（没有 `public` 后缀）。
+
+=======
+
+RECOVERY:
+If something was going wrong, you can visit `/api/v2/app/setPreferences?json=%7B%22alternative_webui_enabled%22:false%7D` to disable alternative Web UI.