Docs: Getting Started Page containing broken link, 404 pages not formatting correctly, and missing step for creating apps via CLI

[kmlamkin9]

Summary

Docs: Getting Started Page containing broken link, 404 pages not formatting correctly, and missing step for creating apps via CLI

Use Cases

1. On the getting started page under step 1, there is the text "Follow the instructions to configure a certificate (and ensure that the client OS trusts it)." In this text, that hyper link points to a 404 page. This text should either be removed from the getting started guide if it's not needed anymore, or the link should be updated to point to the proper doc.
2. The 404 pages are also not formatted correctly and are unreadable.
3. On the getting started page under step 6 create apps via CLI, we should add the command for setting default namespace kubectl config set-context --current --namespace=argocd. The command won't work unless the context points to the argocd namespace. There was a stackoverflow post about it viewed > 2k times. Since it looks like many encounter this issue, we should add a small snippet with this command to reduce # of searches users have to do to spin up ArgoCD.

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