 
		Ergonodes discovers the size of the Ergo network by finding all nodes participating in it. 
DARK
		
	API (JSON)
	GET /api/v1/stats
	
		- Optional query parameter: ?date=YYYY-MM-DD (like 2022-10-02)
- The snapshot for the current day is only recorded at the end of the day, so to select it do not provide the date parameter
Returns: { "countries": {}, "versions": {}, "unreachable": 123, "reachable": 77, "total": 200 }
	GET /api/v1/reachable
	Nodes with a reachable public address
	GET /api/v1/unreachable
	Nodes that are online but not open for incoming connections
	GET /api/v1/offline
	Nodes that were discovered before but cannot be found anymore
	
	Latest additions (non-breaking):
	
		- 2022-08-20: stats.countries now contains the amount of nodes with unknown countries, code "?"
- 2022-08-20: stats now contains the amount of unreachable, reachable and total nodes
- 2022-10-02: stats.nodesPerDay removed
- 2022-10-02: added optional date query parameter to /stats