🚨(frontend) fix some eslint warnings

- Eslint tried to search some configs in the node_modules folder,
we ignore node_modules in the eslint config now.
- Adapt next eslint to use next/babel.

src/frontend/apps/e2e/.eslintrc.js

@@ -5,4 +5,5 @@ module.exports = {
     tsconfigRootDir: __dirname,
     project: ["./tsconfig.json"],
   },
+  ignorePatterns: ["node_modules"],
 };