[K/N] Added possibility to run only base part of benchmarks

kotlin-native/tools/performance-server/ui/src/main/kotlin/main.kt

@@ -190,7 +190,7 @@ fun getDatesComponents() = "${beforeDate?.let {"&before=${encodeURIComponent(it)
         "${afterDate?.let {"&after=${encodeURIComponent(it)}"} ?: ""}"
 
 fun main(args: Array<String>) {
-    val serverUrl = "https://kotlin-native-perf-summary.labs.jb.gg" // use "http://localhost:3000" for local debug.
+    val serverUrl = "http://localhost:3000"
     val zoomRatio = 2
 
     // Get parameters from request.