Nginx反向代理没有将我的http请求发送到在localhost上运行的服务器（POST / GET）

I'm running a node express server on an ec2 instance (ec2-13-229-218-180.ap-southeast-1.compute.amazonaws.com). It is running a web server that handles http POST requests that will interact with an RDS database, returning queries.I'm running a node express server on an ec2 ins