"Tree shaking" of website #86
Description
When loading the web page https://covid19-dash.github.io/, most of the time is spent loading a bunch of javascript files. Using "tree shaking" (https://developer.mozilla.org/en-US/docs/Glossary/Tree_shaking or https://webpack.js.org/guides/tree-shaking/), one should be able to reduce this quite a lot.
Skills required: webpack