title: wget parameters.yml from non-publics S3 Bucket
body: <p>I recently moved my app to elasticbeanstalk, and i am running Symfony3, there is a mandatory parameters.yml file that has to be populated with Environmental variables.</p>
  
  <p>Id like to wget the parameters.yml from a private S3 bucket, limiting access to instances only.</p>
  
  <p>I know i can set the environmental variables directly on the environment, but i have some very very sensitive stuff there, and environmental variables get leaked into my logging system, which is very bad.</p>
  
  <p>I also have multiple environments such as workers using the same environmental variables, and copy pasting them is quite annoying.</p>
  
  <p>So i am wondering if its possible to have the app wget it on deploy, i know how to do that, but i cant seem to configure the S3 bucket to only allow access from instances.</p>