Minimum working configuration

[blaines]

Issue #, if available:
The example given will return a 502 Bad Gateway

Description of changes:

Adding an empty header will make the ALB respond successfully.

Alternatively, using text/plain content type will return the body as plain text.

map[string]string{"Content-Type":"text/plain"}

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov-io]

Codecov Report

Merging #207 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #207   +/-   ##
======================================
  Coverage    77.2%   77.2%           
======================================
  Files          18      18           
  Lines         636     636           
======================================
  Hits          491     491           
  Misses        104     104           
  Partials       41      41

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