Fix vue3 webpack prod script

[rmotitsuki]

Summary

Fix webpack prod script, adding explicity vue3 options to compile for production.

Local Tests

• Install the NPM dependencies npm i
• Build the UI with production script npm run prod
• copy build.js to /kytos/web-ui/dist/build.js
• run kytosd
• access Kytos UI in the browser
• open developer console inside the browser
• Check if there is warning messages about the compatiblity mode with vue2

[viniarck]

@rmotitsuki, great fix, I've also tried it out locally to also help out, it worked for me too. I've noticed this WebGL: INVALID_OPERATION: drawArrays: no valid shader mensage in the console a bit strange, do you have any idea what can it be? I wonder if it's related to issue #69

Other than, that feel free to merge and we'll keep making progress. Thanks, Rogerio.

[viniarck]

After following this tutorial that Rogerio has forwarded to me https://askubuntu.com/questions/299345/how-to-enable-webgl-in-chrome-on-ubuntu, I enabled the Override software rendering list (I already had enabled GPU hw acceleration enabled) and the map loaded correctly and the WebGL messages went away.

The headers error still remains though cc'ing @rmotitsuki, appreciated your help. Also, in my case I didn't notice any significant higher CPU usage, I'll leave this option turned on, if I start seeing anything else alarming I'll report back.