I am getting this error when i deploy a node project to Elastic Beanstalk after that i changed this code

main: src/server.js 

to

main: server.js

in the package.json file then i deleted every src keyword from the whole file. now the amazon relational database service RDS gets connected, the server runs for a moment and they get disconnected as i can see in the log. this is what's in the folder i try to upload

config
controllers
.npmrc
aws.js
aws.js.map
package.json
sequalize.js
sequalize.js.map
server.js
server.js.map

these are the inbound rules of RDS

https://i.stack.imgur.com/XUSHF.png

so what do you suggest?