Open-source ordering system

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Useful resources (links)

• https://futurestud.io/tutorials/tag/retrofit

• https://github.com/google/gson/blob/master/UserGuide.md

• https://square.github.io/retrofit/

• https://www.postgresql.org/docs/9.6/static/datatype-numeric.html

• https://converter.murkin.me/

• Book: Retrofit: Love working with APIs on Android

  We could supply team members with book for free (buy for you), if you going to work on android client.