- add proper formatting to Readme instructions
- fix docker-compose yaml
- add Enabled flag to admin storage, as without it I saw following error on trying to post a comment:
```
mem_store.r42 | 2020/04/03 15:53:52.433 [INFO] {logger/logger.go:120 logger.(*Middleware).Handler.func1.1} POST - /cmd - 172.20.0.3 - 200 (25) - 126.8µs - {"method":"admin.enabled","params":"remark","id":29}
remark42 | 2020/04/03 15:53:52.434 [WARN] {rest/httperrors.go:85 rest.SendErrorJSON} can't save comment - failed to prepare comment: can't get secret for site remark: site remark disabled - 500 (0) - dev_user/dev_user - /api/v1/comment - [rest/api/rest_private.go:121 api.(*private).createCommentCtrl]
```
Flag was originally added 106c018ef1