This Docker image provides elm-lang.org including the try elm. I use this docker file particularly to have the try elm available even if i do not have any internet connection.
The container can be started issuing the following command
docker run --name try-elm -p 8000:8000 jordymoos/try-elm
The container can take a minute to initialize. After that go to http://localhost:8000/try
git clone https://github.com/JordyMoos/try-elm-docker
cd try-elm-docker
docker build -t jordymoos/try-elm .
git clone https://github.com/JordyMoos/try-elm-docker
cd try-elm-docker
docker-compose up