Set production dependencies in package.json

[yubiuser]

What does this PR aim to accomplish?:

We use some third-party js files we ship included with Pi-hole. So far, we updated them from time-to-time whenever we remembered them. As there was no "list" which dependencies we had and which version they are, we needed to look at each js file or even went through the list of PRs.

This PR tries to ease the update process by including all our shipped "production" dependencies in the node package.json where it will be picked up by dependebot which will inform us about new releases. This will not update the shipped js file but is a reminder for us to update the file manually.

The only draw-back of this PR is that all the dependencies will be installed by the devcontainer and during the CI test even tough we won't need them. But I could not figure out a way to only install the devDependencies. (There once was --only=dev but it was removed and not added back.)

I included the versions of the dependencies as they are right now - some are a bit outdated which should be picked up by dependabot once this PR is merged.

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[PromoFaux]

Seems like a good workaround (until we get to a point where we are shipping a compiled interface)

[yubiuser]

shipping a compiled interface

I already thought about this, but decided to postpone it until v7.