#110 Refactor influxdb monitoring

to use it as singleton.
This enables the possibility to monitor processes that are independent of an incoming request.

internal/api/websocket.go

@@ -76,7 +76,7 @@ func (wp *webSocketProxy) waitForExit(exit <-chan runner.ExitInfo, cancelExecuti
 // connectToRunner is the endpoint for websocket connections.
 func (r *RunnerController) connectToRunner(writer http.ResponseWriter, request *http.Request) {
 	targetRunner, _ := runner.FromContext(request.Context())
-	monitoring.AddRunnerMonitoringData(request, targetRunner)
+	monitoring.AddRunnerMonitoringData(request, targetRunner.ID(), targetRunner.Environment())
 
 	executionID := request.URL.Query().Get(ExecutionIDKey)
 	if !targetRunner.ExecutionExists(executionID) {