feature: make markdownlint in Dockerfile

[allencloud]

Signed-off-by: Allen Sun allensun.shl@alibaba-inc.com

Ⅰ. Describe what this PR did

We wish to add all repo needed software in Dockerfile, so we could use a single to image to integration test, circleci testing and no dependency with outer link.

We need to add all the following software:

• golint (https://github.com/golang/lint)
• markdownlint (https://github.com/markdownlint/markdownlint)
• go-swagger (https://github.com/go-swagger/go-swagger)

With this pull request passed and merged, we need to update file https://github.com/alibaba/pouch/blob/master/.circleci/config.yml to use a single one image.

My plan is to build this Dockerfile to be allencloud/pouch:base20180426.

Ⅱ. Does this pull request fix one issue?

none

Ⅲ. Describe how you did it

none

Ⅳ. Describe how to verify it

none

Ⅴ. Special notes for reviews

none

[HusterWan]

awsome work!!!

[codecov-io]

Codecov Report

Merging #1204 into master will increase coverage by 0.1%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #1204     +/-   ##
=========================================
+ Coverage   15.85%   15.96%   +0.1%     
=========================================
  Files         177      176      -1     
  Lines       10266    10135    -131     
=========================================
- Hits         1628     1618     -10     
+ Misses       8518     8399    -119     
+ Partials      120      118      -2

Impacted Files	Coverage Δ
daemon/mgr/container_types.go	15.38% <0%> (-9.94%)	⬇️
daemon/mgr/container.go	0% <0%> (ø)	⬆️
daemon/mgr/cri.go	0% <0%> (ø)	⬆️
daemon/containerio/options.go	0% <0%> (ø)	⬆️
ctrd/container.go	0% <0%> (ø)	⬆️
daemon/containerio/container_io.go	0% <0%> (ø)	⬆️
cli/logs.go	0% <0%> (ø)	⬆️
daemon/containerio/cio.go
apis/opts/mountpoint.go	84.61% <0%> (+6.04%)	⬆️

[allencloud]

LGTM