Installation instructions wrong

[jpfeuffer]

Especially everything that has to do with docker and conda.

Read Existing Documentation

I have checked the following places for the error:

• OpenMS Documentation Troubleshooting
• OpenMS API Developer FAQs

Create OpenMS Bug Report

I have created the bug report in OpenMS for any pipeline errors.

• OpenMS Open Issues

Description of the documentation bug

• I have attached screenshots of the incorrect documentation

Expected behaviour

OpenMS Installation

• Version:

Additional context

[jpfeuffer]

I tried to fix it but my PR was reverted so someone else needs to fix it.

[tapaswenipathak]

dup: #130, closing.