Basic REST app

internal/envconfig/envconfig.go

@@ -0,0 +1,18 @@
+package envconfig
+
+import "os"
+
+type EnvConfig struct {
+	Port string
+}
+
+func Load() EnvConfig {
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "4321"
+	}
+
+	return EnvConfig{
+		Port: port,
+	}
+}