Update Chromium Example

[nfarah86]

Description

Updated Chromium example to include the Docker engine in the Readme, updated script 3, and included the slack community if devs need help

Fixes # (issue)

Type of change

Please delete options that aren't relevant.

• [x] This change requires a documentation update

Checklist

• [x] Updated documentation if needed
• [x] Tests added/amended
• [x ] PR is contained in a single commit, using git amend see some docs

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