Add Docker section to README.md

[tommy-muehle]

Let me know if anything's not clear. Then I'll be happy to adjust this.

[codecov]

Codecov Report

Merging #147 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #147   +/-   ##
=========================================
  Coverage     67.76%   67.76%           
  Complexity      105      105           
=========================================
  Files            11       11           
  Lines           363      363           
=========================================
  Hits            246      246           
  Misses          117      117

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[mglaman]

I'm having hard conflicts on bmitch/churn-php 0.3.1 requires symfony/yaml ^3.3 in global and local projects (Drupal based.) Since there is no phar this was a great workaround.

[Exadra37]

Correct docker command is:

docker run --rm -ti -v "$PWD":/app dockerizedphp/churn run /path/to/code

The typo is in $(PWD) that must be $PWD or $($PWD).

[bmitch]

@tommy-muehle this is very cool. If you can make the adjustment that @Exadra37 pointed out then I will go ahead and merge this. Thanks.

[tommy-muehle]

@Exadra37
Thanks for the hint! I updated the command. Under macOS is also the preceding command with $(PWD) possible. So I didn't realize it.

[bmitch]

Thanks @tommy-muehle