Derivative works under Apache License must carry a notice

The Analytics Beer Primer contains text derived from the Apache AsterixDB primer, which is licensed under the Apache License version 2.0.

According to this license, among other things:

You may reproduce and distribute copies of the Work or Derivative Works thereof in any medium, with or without modifications, and in Source or Object form, provided that You meet the following conditions:

1. You must give any other recipients of the Work or Derivative Works a copy of this License; and
2. You must cause any modified files to carry prominent notices stating that You changed the files; and
3. You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Works; and

We have not done any of these for this file.