Do not set default max memory limits (#201)

build.gradle

@@ -183,7 +183,7 @@ jib {
         }
     }
     container {
-        jvmFlags = ['-Xms1024m', '-Xmx1024m', '-XX:+UseG1GC', '-XX:+ExitOnOutOfMemoryError']
+        jvmFlags = ['-XX:+UseG1GC', '-XX:+ExitOnOutOfMemoryError', '-Xms1024M']
         mainClass = 'io.emeraldpay.dshackle.StarterKt'
         args = []
         ports = ['2448', '2449', '8545']

src/main/kotlin/io/emeraldpay/dshackle/Starter.kt

@@ -31,6 +31,10 @@ private val log = LoggerFactory.getLogger(Starter::class.java)
 
 fun main(args: Array<String>) {
     Schedulers.enableMetrics()
+
+    val maxMemory: Long = Runtime.getRuntime().maxMemory() / (1024 * 1024).toLong()
+    log.info("Max heap size: {} MB", maxMemory)
+
     val app = SpringApplication(Starter::class.java)
     app.setDefaultProperties(ResourcePropertySource("version.properties").source)
     app.setBanner(ResourceBanner(ClassPathResource("banner.txt")))