Update installation step of Wizard

[doppleware]

Let's do two things:

1. Add a tab for "I don't have docker"
2. Make sure we raise an analytics event when you click that tab and include the name of the tab in the event details
3. The tab content text should be: "We'll be adding more options soon but please reach out via Slack (with link) and we'll see if we can still get your Digma up and running - add analytics for the link
4. In addition, lets add a link to the Slack at the bottom of the page with the title "Having trouble? Please reach out in our Slack group"