Added default config if config.yml is missing

Default config:
server:
  serverFolder: "factorio"
  worldFile: "factorio/saves/newworld.zip"
  serverSettings: "factorio/data/server-settings.json"
  serverExec: "factorio/bin/x64/factorio"
  port: 34197

factoryman:
  screen: True
  screenName: "Factorio"
  backupDir: "factorio/backups"
  username: ""
  apitoken: ""

config.go

@@ -9,11 +9,27 @@ import (
 	"gopkg.in/yaml.v3"
 )
 
+func DefCfg() *DefConfig {
+	c := &DefConfig{}
+	// server settings
+	c.Server.ServDir = "factorio"
+	c.Server.ServPort = 34197
+	c.Server.ServCfg = "factorio/data/server-settings.json"
+	c.Server.ServExec = "factorio/bin/x64/factorio"
+	c.Server.WorldFile = "factorio/saves/newworld.zip"
+	c.Factoryman.UseScreen = true
+	c.Factoryman.ScreenName = "factorio"
+	c.Factoryman.BackupDir = "factorio/backups"
+	c.Factoryman.UserName = ""
+	c.Factoryman.ApiToken = ""
+	return c
+}
 func readCfg(factCfg string) UsrConfig {
 	//read config file (YAML)
 	fileBytes, err := os.ReadFile(factCfg)
 	if err != nil {
-		log.Fatalf("Error reading config file: %v", err)
+		fmt.Printf("Error reading config.yml file, using defaults\n")
+		return UsrConfig(*DefCfg())
 	}
 	// return Struct
 	var config UsrConfig

config.yml

@@ -1,6 +1,6 @@
 server:
   serverFolder: "factorio"
-  worldFile: ""
+  worldFile: "factorio/saves/newworld.zip"
   serverSettings: "factorio/data/server-settings.json"
   serverExec: "factorio/bin/x64/factorio"
   port: 34197

structs.go

@@ -19,6 +19,24 @@ type UsrConfig struct {
 	} `yaml:"factoryman"`
 }
 
+type DefConfig struct {
+	Server struct { // server specific settings
+		ServDir   string
+		WorldFile string
+		ServCfg   string
+		ServExec  string
+		ServPort  int
+	}
+
+	Factoryman struct { // factoryman settings
+		BackupDir  string
+		UseScreen  bool
+		ScreenName string
+		UserName   string
+		ApiToken   string
+	}
+}
+
 // JSON file from config
 type Mod struct {
 	Name    string `json:"name"`