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Replace the COPY bmp /dos/bmp with your game.
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You can also change the default password, or override it with a -e parameter when you run the image.
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Now, with Docker, build the image. I’m assuming you already have Docker installed and are familiar with it to some extent. CD to the directory in a console and run the command…
docker build -t mydosbox .-
Run the image.
docker run -p 6080:80 mydosbox-
Open a browser and point it to http://localhost:6080/vnc.html
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You should see a prompt for the password. Type it in, and you should be able to connect to your container with DosBox running. The game is started automatically.
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Once your image is built, you can push it to your image repository with docker push, but you’ll need to tag it appropriately.