Upgrade go version to 1.17 in Dockerfile

[zzxwill]

Upgrade go version in Dockerfile

Signed-off-by: Zheng Xi Zhou zzxwill@gmail.com

[codecov]

Codecov Report

Merging #257 (bacb79d) into master (97b3f99) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #257   +/-   ##
=======================================
  Coverage   74.91%   74.91%           
=======================================
  Files          19       19           
  Lines        1188     1188           
=======================================
  Hits          890      890           
  Misses        226      226           
  Partials       72       72           

Flag	Coverage Δ
unit	74.91% <ø> (ø)

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