Use serviceName local in start page template

[frankieroberto]

Currently the Create pages step of the basic prototype tutorial says to copy and paste the start-page.html template and then:

You'll normally edit the HTML to make changes to pages, but the service name is in a config file. This is so we can change it in one place to update it on every page in your prototype.

However currently the <h1> and pageTitle (used for <title> tag) has a hardcoded start name. 🤦

It makes sense for this to be dynamic, so let’s use the local serviceName variable instead.

Fixes #413 - thanks @anandamaryon1 for reporting.

Checklist

• CHANGELOG entry