Permissions layer is large

[grayside]

Problem

The permissions layer which reassigns several directories to ownership by the puppeteer user is 90mb per https://microbadger.com/images/outrigger/pa11y:dev.

We want to have the smallest image possible so download times and storage space are both minimized.

Solution

Wow! How can we fix that?

Combine the run statement that adds pa11y with the run statement that sets the permissions. That way there is only one layer, and the full size of the pa11y source files is not duplicated into an additional layer.

Testing

After making your changes to the Dockerfile:

• Run ./build.sh
• Identify the docker image from the last couple lines of build output.
• Run docker image inspect and look for the file size, see that the size is smaller now than is reported by microbadger.