fix funtion

main.go

@@ -9,26 +9,30 @@ import (
 	"time"
 )
 
-func getConfigFromEnv(item string) {
+func getConfigFromEnv(item string) string {
 	var res = ""
 	value := os.Getenv("CONFIG_ENVVAR")
 	if value == "" {
 		value = "ADDRESS,INITIALCOST,MONTHLYCOST"
 	}
-	configarr = strings.Split(value, ",")
+	configArr := strings.Split(value, ",")
-	if len(configarr) < 3 {
+
+	// Check for expected length to prevent out-of-range panic
+	if len(configArr) < 3 {
 		logit("CONFIG_ENVVAR has less than 3 elements")
+		return "NOTFOUND"
 	}
-	if item == "address" {
+
-		res = configarr[0]
+	switch strings.ToLower(item) {
-	} else if item == "initialcost" {
+	case "address":
-		res = configarr[1]
+		return configArr[0]
-	} else if item == "monthlycost" {
+	case "initialcost":
-		res = configarr[2]
+		return configArr[1]
-	} else {
+	case "monthlycost":
-		res = "NOTFOUND"
+		return configArr[2]
+	default:
+		return "NOTFOUND"
 	}
-	return res
 }
 
 func serveTemplate(w http.ResponseWriter, r *http.Request) {
@@ -91,7 +95,6 @@ func serveTemplate(w http.ResponseWriter, r *http.Request) {
 		Address        string
 		InitialCost    string
 		MonthlyCost    string
-		Address        string
 		Scales         []string
 		LastMetrics    []OneMetric
 		QueryValues    map[string][]string