DT-5508 configure Kajaani into waltti opas

Fx varely service texts

fix: use url param instead of header for map subscription key

fix: yks. linjan tietojen määränpään korjaus DT-5155

…abel loose config

> If you want to change the default set of browsers, we recommend combining `last 2 versions`, `not dead` with a usage number like `> 0.2%`. This is because `last n versions` on its own does not add popular old versions, while only using a percentage above 0.2% will in the long run make popular browsers even more popular. We might run into a monopoly and stagnation situation, as we had with Internet Explorer 6. Please use this setting with caution.

https://github.com/browserslist/browserslist/blob/2f4771f99b2bd41816d6e76f5a57b66d62a89ebb/README.md#best-practices

- webpack@5
	- remove terser-webpack-plugin, now built-in
	- add url, because it is needed for polyfilling
	- optimize-css-assets-webpack-plugin -> css-minimizer-webpack-plugin
- upgrade dev dependencies
	- webpack-dev-server@4
	- compression-webpack-plugin@10
	- copy-webpack-plugin@11
	- css-loader@6
	- mini-css-extract-plugin@2
	- style-loader@3, postcss-loader@7, sass-loader@13, node-sass@7

… icon 🐛