feat: Docker optimizations to improve run time

[iamludal]

Following #285

This PR improves run time by making the following Docker optimizations:

• Use public Docker image from ghcr instead of building it at every run
• Leverage @vercel/ncc and multi-stage build to reduce the final image size (from 240MB to 180MB, see below)

$ docker images
REPOSITORY                    TAG           IMAGE ID       CREATED          SIZE
action-node-multi             latest        902e7b743d17   3 minutes ago    180MB
action-node                   latest        6cd06307972c   3 minutes ago    240MB

Migrating to a node engine instead of Docker seems more difficult. To be able to install a npm package, users should add an extra step actions/setup-node before using the action, which is not convenient. Another way to install a npm package is to use the npm programmatic API, but it has been removed since version 8.0.0, so I don't think it's a great idea.

Anyway, performance improvements are not as significant as using a node engine. But with these changes, the Docker image does not contain the entirenode_modules folder and the image is not built at each run.

Results

Before:

After:

[aslafy-z]

Thank you for the contribution. Are you sure about the order of the screenshots? Looks like actions are longer to execute in average from your numbers.
I will do some more testing in the coming days to ensure we're not breaking anything, I'll get back to you ASAP.

[iamludal]

You're right, I messed up with the order of the screenshots, thanks. 😄
I have changed the order.

[aslafy-z]

Thank you for your time, however, I decided to archive this repository. Please see https://github.com/aslafy-z/conventional-pr-title-action#important-notice-this-repository-has-been-archived.