initial commit from original sev version

internal/middlewares/cors.go

@@ -0,0 +1,16 @@
+package middlewares
+
+import "net/http"
+
+func CORS(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		writer.Header().Set("Access-Control-Allow-Origin", "*")
+		writer.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
+		if request.Method == http.MethodOptions {
+			writer.WriteHeader(http.StatusNoContent)
+			return
+		}
+		next.ServeHTTP(writer, request)
+	})
+}