Show Signalen map for end-users

[boris-arkenaar]

Show a map on a separate page behind a specific URL, which is publicly accessible and which displays the currently open incidents on that map.

Frontend story for Signalen/backend#79.

Requirements of a map with open signals for end-users (reporters):

• URL of the map accessible to everyone
• Map with all open signals
• High refresh rate (virtually live data)
• Signals can be shown clustered in accordance with the current map in the back office
• No personal data is shown on the map
• In a signal the following data is shown:
  • Unique signal number
  • Date of receipt signal
  • Main category
  • Subcategory
  • Status