Added arn to the main repository

arn/Production.go

@@ -0,0 +1,22 @@
+package arn
+
+import (
+	"os"
+	"strings"
+)
+
+// IsProduction returns true if the hostname contains "arn".
+func IsProduction() bool {
+	return strings.Contains(HostName(), "arn")
+}
+
+// IsDevelopment returns true if the hostname does not contain "arn".
+func IsDevelopment() bool {
+	return !IsProduction()
+}
+
+// HostName returns the hostname.
+func HostName() string {
+	host, _ := os.Hostname()
+	return host
+}