Use local-web-server package for all servers

[camillobruni]

• Merge the test, dev and npm run server commands to use local-web-server.
• Send COEP headers by default
• Run npm ci to regenerate package-lock and sort package.json entries
• Resolve committed merge conflict in bundled news-site workload

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[julienw]

Looks like the CI failed too

[camillobruni]

I've just noticed that we changed the default port from 7000 to 8000 previously. Are folks ok with this in general? (No strong opinion from my side)

[julienw]

Also it's worth updating to latest version of koa (probably you can checkout the package-lock.json from the main branch, and run npm i again).

[julienw]

Also it's worth updating to latest version of koa (probably you can checkout the package-lock.json from the main branch, and run npm i again).

BTW I still see 2.15.3 instead of 2.15.4.

[camillobruni]

I never know what the command for this is npm i didn't do the trick, so I now ran npm audit fix and updated a bunch of other packages too.