Initial web commit.

**Description**

These static files are the basis for the web application. When simple HTTP request will come to the server (not a GET request for some data), then the `index.html` should be handed back. JavaScript will take things from there (rendering HTML templates, requesting for data via GET, etc.).

@auraz When you have time, please update the Python code to give back `web/index.html`.

**Reviewers**

@auraz