add tests and make several replacements/improvements

startup/launcher/src/jvmMain/kotlin/Main.kt

@@ -0,0 +1,18 @@
+package dev.inmo.micro_utils.startup.launcher
+
+import dev.inmo.kslog.common.KSLog
+import dev.inmo.kslog.common.i
+import kotlinx.serialization.json.jsonObject
+import java.io.File
+
+suspend fun main(args: Array<String>) {
+
+    KSLog.default = KSLog("ServerLauncher")
+    val (configPath) = args
+    val file = File(configPath)
+    KSLog.i("Start read config from ${file.absolutePath}")
+    val json = defaultJson.parseToJsonElement(file.readText()).jsonObject
+    KSLog.i("Config has been read")
+
+    start(json)
+}