INS app to fetch temperature data and visualize them

[platisd]

Description

As an facilities manager I want to be able to see what is the temperature around each INS-node so to be able to adjust the heating or cooling accordingly.

Definition of Done

• INS app to fetch the temperature data for each node id from the server.
  • The POST request should be formulated as http://localhost:9080/get_temperature/id where id is an arbitrary identification number (integer) until #82 is implemented.
• The temperature is visualized with different colors over a map of the floor.
• Documentation is updated accordingly (if applicable).

[platisd]

@Dionysios it goes without saying that you should feel free to add more details to this issue, as long as the scope doesn't stretch "too much" :stuck_out_tongue: .