[Snyk] Security upgrade rails from 4.2.8 to 4.2.11.3

[ayoinc]

Snyk has created this PR to fix 1 vulnerabilities in the rubygems dependencies of this project.

Snyk changed the following file(s):

• play-with-docker/Portus/Gemfile

⚠️ Warning

``` Failed to update the Gemfile.lock, please update manually before merging. ```

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Remote Code Execution (RCE) SNYK-RUBY-ACTIONVIEW-569156	876

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[ayoinc]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scanner	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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