Request: Docs on providing environmental variables to shiny-server

[nick-youngblut]

I'm trying to run shiny-server within a docker container. For example:

docker run -it --rm -u shiny \
  -p 5000:5000 \
  --env-file ~/.Renviron \
  ${IMG_NAME}:${IMG_VERSION}

However, it appears that shiny-server wipes most environmental variables, according to this old thread. The thread pointed to a discussion in which the solution was to write the environmental variables (potentially sensitive secrets) in a file in the docker container, which I thought was a big security risk.

For the sake of security when developers deploy shiny apps with shiny-server, it would be great to have specific docs on how to deal with environmental variables and secrets handling. At least, I cannot find an such info in the docs.