fix godforsaken nullpointer issue caused by missing ssl config values in default config

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/ConfigEnvironmentPostProcessor.java

@@ -5,9 +5,9 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import com.gregor_lohaus.gtransfer.config.types.Config;
-
+// import com.google.gson.Gson;
+// import com.google.gson.GsonBuilder;
 import org.springframework.boot.EnvironmentPostProcessor;
-// import org.springframework.boot.env.EnvironmentPostProcessor;
 import org.springframework.boot.SpringApplication;
 import org.springframework.core.env.ConfigurableEnvironment;
 
@@ -41,6 +41,10 @@ public class ConfigEnvironmentPostProcessor implements EnvironmentPostProcessor
 				System.exit(1);
 			}
 			Config defaultConfig = DefaultConfig.config;
+			// Gson gson = new GsonBuilder().setPrettyPrinting().serializeNulls().create();
+			// String json = gson.toJson(defaultConfig);
+			// System.out.println(json);
+			
 			table = ConfigSerializer.toToml(defaultConfig);
 			toml.write(CONFIG_FILE_PATH, table);
 		}

Backend/src/main/java/com/gregor_lohaus/gtransfer/config/DefaultConfig.java

@@ -50,6 +50,8 @@ public class DefaultConfig {
     svc2.port = 8080;
     SslConfig ssl = new SslConfig();
     ssl.enabled = false;
+    ssl.certificatePrivateKey = "";
+    ssl.certificate = "";
     svc2.sslConfig = ssl;
     c.serverConfig = svc2;