Remove trailing slash in nginx volume name docker-logs-nginx

[ThomasBoom89]

Fixes #519

[codecov]

Codecov Report

Merging #520 (8921806) into master (718fd02) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #520   +/-   ##
=========================================
  Coverage     99.32%   99.32%           
  Complexity     1884     1884           
=========================================
  Files           300      300           
  Lines          5970     5970           
=========================================
  Hits           5930     5930           
  Misses           40       40           

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[akondas]

Thanks 🏅