port defaults to 5000

main.go

@@ -11,6 +11,10 @@ import (
 func main() {
 	r := mux.NewRouter()
 	port := os.Getenv("PORT")
+	if port == "" {
+		port = "5000"
+	}
+
 	c := r.PathPrefix("/conservation/v1").Methods("GET").Subrouter()
 
 	// two handlerpaths makes sure that the caller does not HAVE to specify limit