docs: Getting started demo + sandbox

[Jayclifford345]

I have added a getting-started demo based on the ride-share app. This takes users through the basics of using Pyroscope to identify a bottleneck within the application code provided. This tutorial also provides a interactive sandbox for the user to try out this demo: https://killercoda.com/grafana-dev-testing/course/pyroscope/ride-share-tutorial

Unfortunately, there is an unusual bug within the Profile Explorer app (when using the sandbox) for which I am seeing help. For now, I have tagged this within the sandbox and once fixed will remove the notice. The rest of the sandbox which uses the Pyroscope UI works great! There is also a grafana play link so they can try this there

{{<docs/ignore>}}
{{< admonition type="tip" >}}
Unfortunately, due to a bug within the Sandbox environment, the profile explorer app is currently unavailable. We are working on a fix and will update this tutorial once resolved. If you would like to try out the profile explorer app, you can run the example locally on your machine. Or you can try out this example in [Grafana Play](https://play.grafana.org/a/grafana-pyroscope-app/profiles-explorer?searchText=&panelType=time-series&layout=grid&hideNoData=off&explorationType=labels&var-serviceName=pyroscope-rideshare-python&var-profileMetricId=process_cpu:cpu:nanoseconds:cpu:nanoseconds&var-dataSource=grafanacloud-profiles&var-groupBy=all&var-filters=)
{{< /admonition >}}
{{</docs/ignore>}}

I belive for now the rest of the demo is good enough to get out there. Many thanks in advance for the review!

[CLAassistant]

All committers have signed the CLA.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[knylander-grafana]

I'll be looking at this today and tomorrow. Thank you!

[Jayclifford345]

@knylander-grafana just wondering if you had a chance to take a look? No rush :)

[Jayclifford345]

Hi @knylander-grafana sorry for the late turn around let me know if there are any other areas that need changed. Many thanks again for the review!

[knylander-grafana]

Hi @knylander-grafana sorry for the late turn around let me know if there are any other areas that need changed. Many thanks again for the review!

You're welcome! I'll do another review today.

[knylander-grafana]

Thank you for updating the steps to the Explore Profiles app. The steps match what's in the Killercoda environment. Preview looks okay on the page and on Killercoda.

Most of my suggestions are cleanup from the Pyroscope UI to the Explore Profiles app.

[knylander-grafana]

Not sure why this appeared twice.

[github-actions]

This PR must be merged before a backport PR will be created.

[knylander-grafana]

@Jayclifford345 I wanted to thank you for writing this tutorial. This is a great contribution.

You signed the CLA, right? Weird that there is one message that says the CLA is needs to be signed and another one has been signed.

Once we work through my comments, then we can get this merged. I'm so excited for this! I wonder if we could include it in the Explore Profiles docs too.

What would you think about sharing the content between both locations?

[Jayclifford345]

Yeah weird on the CLA I tried to sign again but it says I already signed. That should be all of your changes in thanks again for taking the time to go through it all and the corrections. Ready for your review once again. More than happy for it to go into the Explore Profiles section aswell. Let me know where you think its best place :)

[knylander-grafana]

Okay! I'll review this today. :) let's have it in Pyroscope and look at whether we want to include in Explore Profiles too. I'll ask about sharing.

[knylander-grafana]

Looks great!

[knylander-grafana]

If this looks good to you, would you like me to merge?

[Jayclifford345]

Hi @knylander-grafana, I sadly don't have permission to merge :(. If you wouldn't mind doing the honours!