Exclude .next & include .gitignore (#757)

e2e-tests/snapshots/engine.spec.ts_send-message-to-engine-1.txt

@@ -23,7 +23,7 @@
       "files": [
         {
           "path": ".gitignore",
-          "content": "// File contents excluded from context",
+          "content": "# Logs\nlogs\n*.log\nnpm-debug.log*\nyarn-debug.log*\nyarn-error.log*\npnpm-debug.log*\nlerna-debug.log*\n\nnode_modules\ndist\ndist-ssr\n*.local\n\n# Editor directories and files\n.vscode/*\n!.vscode/extensions.json\n.idea\n.DS_Store\n*.suo\n*.ntvs*\n*.njsproj\n*.sln\n*.sw?\n",
           "force": false
         },
         {