Change docker images in test

[duck8823]

For more quickly and save disk space.
fix #72

[coveralls]

Pull Request Test Coverage Report for Build 391

• 2 of 3 (66.67%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 92.056%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
infrastructure/docker/docker.go	2	3	66.67%

Totals
Change from base Build 389:	0.01%
Covered Lines:	591
Relevant Lines:	642

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💛 - Coveralls