51degrees module + Dockerfile + build instructions

[justadreamer]

Changes

This PR contains the following changes:

• Reinstating the previously reverted 51Degrees module (originally merged as part of New Module: 51Degrees #3650, reverted as part of Revert "New Module: 51Degrees (#3650)" #3888)
• Amending Dockerfile and README with necessary dependencies (gcc, enabling cgo, libatomic) as in PR Dockerfile: enable building cgo dependencies #3865

Original PR Description

Type of change

• Feature
• New module

Description of change

51Degrees module enriches an incoming OpenRTB request with 51Degrees Device Data.

51Degrees module sets the following fields of the device object: make, model, os, osv, h, w, ppi, pxratio - interested bidder adapters may use these fields as needed. In addition the module sets device.ext.fiftyonedegrees_deviceId to a permanent device ID which can be rapidly looked up in on premise data exposing over 250 properties including the device age, chip set, codec support, and price, operating system and app/browser versions, age, and embedded features.

The module is based on the open source 51Degrees device detection library: https://github.com/51Degrees/device-detection-go.

Integration details are specified in the modules/fiftyone_degrees/device_detection/README.md.

Maintainer contacts:

[email protected]

[bsardo]

Tested the following manual builds:
built on windows/amd64 targeted for windows/amd64
built on darwin/amd64 targeted for darwin/amd64
built on linux/amd64 targeted for linux/amd64
built on darwin/amd64 targeted for darwin/arm64
built on darwin/arm64 targeted for windows/amd64

Instructions for these scenarios will be published as examples in a build readme as part of another PR.