Add user model through devise. Add some basic layout. Start testing in travis.

package.json

@@ -6,6 +6,9 @@
     "@rails/activestorage": "^6.0.0",
     "@rails/ujs": "^6.0.0",
     "@rails/webpacker": "4.3.0",
+    "bootstrap": "^4.5.2",
+    "jquery": "^3.5.1",
+    "popper.js": "^1.16.1",
     "toastr": "^2.1.4",
     "turbolinks": "^5.2.0"
   },