feat(logger): add datadog logging

imports/logger/server.lua

@@ -0,0 +1,30 @@
+local key = GetConvar('datadog:key', '')
+
+if key ~= '' then
+	local site = ('https://http-intake.logs.%s/api/v2/logs'):format(GetConvar('datadog:site', 'datadoghq.com'))
+	local resourceName = GetCurrentResourceName()
+	key = key:gsub("[\'\"]", '')
+
+	return function(source, event, message, ...)
+		local data = json.encode({
+			hostname = resourceName,
+			service = event,
+			message = message,
+			ddsource = tostring(source),
+			ddtags = string.strjoin(',', string.tostringall(...))
+		})
+
+		PerformHttpRequest(site, function(status, _, _, response)
+			if status ~= 202 then
+				-- Thanks, I hate it
+				response = json.decode(response:sub(10)).errors[1]
+				print(('unable to submit logs to %s\n%s'):format(site, json.encode(response, {indent=true})))
+			end
+		end, 'POST', data, {
+			['Content-Type'] = 'application/json',
+			['DD-API-KEY'] = key
+		})
+	end
+end
+
+return function() end