Move all E2E dependencies into its own folder, run from there (#3068)

* Move all E2E dependencies into its own folder, run from there

* Run flaky-tests from E2E folder

* This should work better

* Fix E2E test for Linux

* Fix for Windows, fix lint

e2e/webpack.config.js

@@ -0,0 +1,56 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+const path = require('path');
+
+const glob = require('glob');
+const webpack = require('webpack');
+
+module.exports = {
+    mode: 'development',
+    entry: {
+        e2e: glob.sync('./specs/**/*.js'),
+    },
+    output: {
+        path: path.resolve(__dirname, 'dist/'),
+        filename: '[name]_bundle.js',
+    },
+    plugins: [
+        new webpack.DefinePlugin({__IS_MAC_APP_STORE__: false}),
+    ],
+    externals: {
+        electron: 'require("electron")',
+        fs: 'require("fs")',
+        ws: 'require("ws")',
+        child_process: 'require("child_process")',
+        dns: 'require("dns")',
+        http2: 'require("http2")',
+        net: 'require("net")',
+        repl: 'require("repl")',
+        tls: 'require("tls")',
+        playwright: 'require("playwright")',
+        robotjs: 'require("robotjs")',
+    },
+    module: {
+        rules: [{
+            test: /\.(js|ts)?$/,
+            exclude: /node_modules/,
+            loader: 'babel-loader',
+        }],
+    },
+    node: {
+        __filename: false,
+        __dirname: false,
+    },
+    target: 'node',
+    resolve: {
+        modules: [
+            'node_modules',
+            '../src',
+        ],
+        alias: {
+            src: path.resolve(__dirname, '../src'),
+        },
+        extensions: ['.ts', '.js'],
+    },
+};