add examples for services

src/main/kotlin/microservice/pricingService.kt

@@ -36,6 +36,9 @@ fun CoroutineScope.launchPriceUpdate(
 ): Job = launch {
     val cache = ArrayDeque<Pair<Instant, BigDecimal>>()
 
+    //restore from db
+    val now = Clock.System.now()
+    cache.addAll(db.restorePrice((now-duration)..now))
 
     //read job
     launch {
@@ -61,7 +64,7 @@ fun CoroutineScope.launchPriceUpdate(
     //cache cleanup job
     launch {
         while (isActive) {
-            delay(1.minutes)
+            delay(10.minutes)
             val now = Clock.System.now()
             cache.removeIf { now - it.first > duration }
         }