Add dotenv and update reducer structure

opentech/static_src/src/app/src/SubmissionsByRoundApp.js

opentech/static_src/src/app/src/api/utils.js

...ech/static_src/src/app/src/components/DetailView/index.js

...tic_src/src/app/src/containers/GroupByStatusDetailView.js

...tech/static_src/src/app/src/redux/reducers/submissions.js

...ech/static_src/src/app/src/redux/selectors/submissions.js

opentech/static_src/src/app/webpack.base.config.js

opentech/static_src/src/app/webpack.dev.config.js

package-lock.json

package.json