CI server requirements

Hardware

1. At least 2 GB memory
2. At least 10 GB free disk space (depends on how much artifacts will be stored)
3. Stable network connection

Software

1. Any Linux OS with Kernel higher 3.10
2. Oracle Java 8
3. Git
4. Jenkins CI
5. Gradle 2.9 or higher
6. Docker
7. Docker Compose
8. Xvfb