I have an AWS Elastic Beanstalk app, which I would like to customize — but beyond what the EB configuration (console) editing feature allows.

I am trying to update self signed SSL/TLS on AWS Elastic Beanstalk (node.js sample application) single instance.

I edited the launch template associated with one of my environments, which created a new version. But then when I added a new instance to the environment, it still used the old version.

My site where i hosted my web app is down. when I tried to to go to the site it shows 502 Bad Gateway.
so when I login to AWS and check the Elastic Beanstalk I discovered the health status is showing Severe in red, then I went to AWS cloud Watch and find the following information

I’ve my application running on AWS EC2, just of a sudden the site stop working. when i tried to open the site it show error:502 bad gateway.
so when i login to AWS to check the problem, I discover the elastic beanstalk health showing severe in red.
then in opened it and it shows me the message below

i tried to run docker multiple container app on ElasticBeanstalk, Health is OK, logs are fine
i have running 2 apps in nodejs in docker its working fine in local enviroment but when i upload my code zip file on ElasticBeanstalk everything is fine except for the end result
which is “Connection refused” error
i am very new on AWS and dont know what to do
or what is the actual proccess to do that