Fix bash snippets in Docker.md

[dmitsf]

Description

Just fix the bash snippets in this file. The current ones are a bit broken due to incorrect indentation.

How that was before:

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Feature/Issue validation/testing

This is just a README-related change, don't require tests.

Checklist:

• Did you have fun?
• Have you added tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

[codecov]

Codecov Report

Merging #2345 (17dd4ef) into master (39e715d) will not change coverage.
The diff coverage is n/a.

❗ Current head 17dd4ef differs from pull request most recent head 990bcb4. Consider uploading reports for the commit 990bcb4 to get more accurate results

@@           Coverage Diff           @@
##           master    #2345   +/-   ##
=======================================
  Coverage   72.86%   72.86%           
=======================================
  Files          78       78           
  Lines        3697     3697           
  Branches       58       58           
=======================================
  Hits         2694     2694           
  Misses        999      999           
  Partials        4        4           

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