[#349] Add the usage of Indigo by docker called `indigo-trial` to the tutorial

Description

Problem: After some effort on improving Indigo installation using docker, we should add how to use it in Indigo tutorial.

Solution: Explain Indigo by docker as indigo-trial, add the installation, and add its usage in the tutorial.

Related issue(s)

Resolves parts of: #349 (closed)

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• Tests (see short guidelines)

  • If I added new functionality, I added tests covering it.
  • If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.

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    • docs/
  • I updated changelog files of all affected packages released to Hackage if my changes are externally visible.

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