Initial commit for Postgres Operator UI (#613)

* Initial commit for our basic Postgres Operator UI:
 * Create and modify Postgres manifests
 * Watch Operator Logs in the UI
 * Observe cluster creation progress
 * S3 Backup browser for clone and restore

Many thanks to Manuel Gomez and Jan Mussler for the initial UI work a long time ago!

ui/app/package.json

@@ -0,0 +1,54 @@
+{
+  "name": "postgres-operator-ui",
+  "version": "1.0.0",
+  "description": "PostgreSQL Operator UI",
+  "main": "src/app.js",
+  "config": {
+    "buildDir": "../operator_ui/static/build"
+  },
+  "scripts": {
+    "prestart": "npm install",
+    "start": "NODE_ENV=development webpack --watch",
+    "webpack": "webpack --config ./webpack.config.js",
+    "build": "NODE_ENV=development npm run webpack",
+    "prewebpack": "npm run clean",
+    "lint": "eslint ./src/**/*.js",
+    "clean": "rimraf $npm_package_config_buildDir && mkdir $npm_package_config_buildDir"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/zalando/postgres-operator.git"
+  },
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/zalando/postgres-operator.git/issues"
+  },
+  "homepage": "https://github.com/zalando/postgres-operator.git#readme",
+  "dependencies": {
+    "@babel/core": "^7.0.0-beta.46",
+    "@babel/polyfill": "^7.0.0-beta.46",
+    "@babel/runtime": "^7.0.0-beta.46",
+    "pixi.js": "^4.7.3"
+  },
+  "devDependencies": {
+    "@babel/plugin-transform-runtime": "^7.0.0-beta.46",
+    "@babel/preset-env": "^7.0.0-beta.46",
+    "babel-loader": "^8.0.0-beta.2",
+    "brfs": "^1.6.1",
+    "dedent-js": "1.0.1",
+    "eslint": "^4.19.1",
+    "eslint-loader": "^1.6.1",
+    "js-yaml": "3.13.1",
+    "pug": "^2.0.3",
+    "rimraf": "^2.5.4",
+    "riot": "^3.9.5",
+    "riot-hot-reload": "1.0.0",
+    "riot-route": "^3.1.3",
+    "riot-tag-loader": "2.0.2",
+    "sort-by": "^1.2.0",
+    "transform-loader": "^0.2.3",
+    "webpack": "^4.28.2",
+    "webpack-cli": "^3.1.2"
+  }
+}