Correctly configuring vue-router for use with ream

[marianhlavac]

There should be in the documentation a mention of how to configure vue-router correctly.

@jnv found out that you have to use the history mode. See cvut/fittable-next@8444947#diff-15ee858ae5d5aa9b3e2846cfd1c4c466

Without the fix it's not possible to match server-rendered content on client.

[egoist]

Ah yes, I should mention this in the docs, and it's recommend to always use () => import('./path/to/view.vue') for code-split

[egoist]

Doc has been updated for this. https://ream.github.io/ream/#/?id=router-instance