### Docker

- [Interactive Docker training portal](https://www.katacoda.com/courses/docker/) on [Katakoda](https://www.katacoda.com/)
- [Where are Docker images stored?](http://blog.thoward37.me/articles/where-are-docker-images-stored/)
- [Dockerfile reference](https://docs.docker.com/reference/builder/)
- [Dockerfile best practices](https://docs.docker.com/articles/dockerfile_best-practices/)
- [Volumes](https://docs.docker.com/userguide/dockervolumes/)

### DockerHub

- [Repositories](https://docs.docker.com/userguide/dockerrepos/)
- [Teams and organizations](https://docs.docker.com/docker-hub/orgs/)
- [GitHub automated build](https://docs.docker.com/docker-hub/github/)

### Service management

- [Using supervisord](https://docs.docker.com/articles/using_supervisord/)
- [Nginx in the foreground](http://nginx.org/en/docs/ngx_core_module.html#daemon)
- [supervisord](http://supervisord.org/)