diff --git a/.gitignore b/.gitignore
index 0af9901..1e0c0f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,4 @@
 /.idea/
 /My*
 /my*
+/server-config.yaml
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/YamlUtils.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/YamlUtils.kt
index 9f83cc7..ccdf605 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/YamlUtils.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/core/YamlUtils.kt
@@ -5,6 +5,7 @@ import com.charleskorn.kaml.YamlConfiguration
 import kotlinx.serialization.InternalSerializationApi
 import kotlinx.serialization.serializer
 import java.io.BufferedReader
+import java.io.File
 import java.io.FileReader
 
 
@@ -12,6 +13,10 @@ fun readFromFile(fileName: String): String {
     return BufferedReader(FileReader(fileName)).use { it.readText() }
 }
 
+fun writeToFile(fileName: String, text: String) {
+    File(fileName).writeText(text)
+}
+
 
 @OptIn(InternalSerializationApi::class)
 inline fun <reified T : Any> String.yamlToType() = Yaml(configuration = YamlConfiguration(strictMode = false)).decodeFromString(
@@ -21,7 +26,7 @@ inline fun <reified T : Any> String.yamlToType() = Yaml(configuration = YamlConf
 
 
 @OptIn(InternalSerializationApi::class)
-inline fun <reified T : Any> T.toYaml() = Yaml(configuration = YamlConfiguration(strictMode = false)).encodeToString(
+inline fun <reified T : Any> T.toYaml() = Yaml(configuration = YamlConfiguration(strictMode = false, encodeDefaults = false)).encodeToString(
     T::class.serializer(),
     this
 )
diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/k3s/ConfigRepository.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/k3s/ConfigRepository.kt
index 1382987..f75d684 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/k3s/ConfigRepository.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/server/infrastructure/k3s/ConfigRepository.kt
@@ -2,6 +2,8 @@ package org.domaindrivenarchitecture.provs.server.infrastructure.k3s
 
 import org.domaindrivenarchitecture.provs.configuration.domain.ConfigFileName
 import org.domaindrivenarchitecture.provs.framework.core.readFromFile
+import org.domaindrivenarchitecture.provs.framework.core.toYaml
+import org.domaindrivenarchitecture.provs.framework.core.writeToFile
 import org.domaindrivenarchitecture.provs.framework.core.yamlToType
 import org.domaindrivenarchitecture.provs.server.domain.k3s.K3sConfig
 import org.domaindrivenarchitecture.provs.server.domain.k3s.Node
@@ -9,11 +11,18 @@ import java.io.File
 
 private const val DEFAULT_CONFIG_FILE = "server-config.yaml"
 
-fun getK3sConfig(fileName: ConfigFileName?): K3sConfig {
+fun getK3sConfig(fileName: ConfigFileName? = null): K3sConfig {
     val filename = fileName?.fileName ?: DEFAULT_CONFIG_FILE
-    return if (File(filename).exists() || (filename != DEFAULT_CONFIG_FILE)) {
-        readFromFile(filename).yamlToType()
-    } else {
-        K3sConfig("localhost", Node("127.0.0.1"), apple = true)
+
+    if ((filename.substringAfterLast("/") == DEFAULT_CONFIG_FILE) && !File(filename).exists()) {
+        writeK3sConfig(ConfigFileName(filename), K3sConfig("localhost", Node("127.0.0.1"), apple = true))
     }
+    return readFromFile(filename).yamlToType()
 }
+
+fun writeK3sConfig(fileName: ConfigFileName, config: K3sConfig) {
+    writeToFile(fileName.fileName, config.toYaml())
+}
+fun main() {
+    getK3sConfig()
+}
\ No newline at end of file
diff --git a/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/YamlUtilsKtTest.kt b/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/YamlUtilsKtTest.kt
index 9e3d5a7..9c99c20 100644
--- a/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/YamlUtilsKtTest.kt
+++ b/src/test/kotlin/org/domaindrivenarchitecture/provs/framework/core/YamlUtilsKtTest.kt
@@ -34,13 +34,7 @@ internal class YamlUtilsKtTest {
             fqdn: "host"
             node:
               ipv4: "1.2.3.4"
-              ipv6: null
-            loopback:
-              ipv4: "192.168.5.1"
-              ipv6: "fc00::5:1"
-            certmanager: null
-            apple: null
-            reprovision: false""".trimIndent()
+            """.trimIndent()
 
         assertEquals(expected, yaml)
     }