How to use it

1. Go to google could console.
2. Create a Service account (Create crdentials -> Service account)
3. In Service accounts section click on newly created enail address
4. Go to Keys tab and
5. Create new key with type json
6. Put downloaded json in res folder and rename it to credentials.json
7. Build and run the docker image somehow and somewhere
8. TODO: write how it integrate it with Yandex Forms