Some minor corrections at "rodando aplicações gui em docker" and "running gui...

Some minor corrections at "rodando aplicações gui em docker" and "running gui applications with docker"
2 jobs for master in 45 seconds (queued for 1 minute and 41 seconds)
Status Job ID Name Coverage
  Build
failed #14341887
build

00:00:45

 
  Deploy
skipped #14341888
deploy site
 
Name Stage Failure
failed
build Build There is an unknown failure, please try again
9c910e9c79b2: Pull complete
4ac165c66a37: Pull complete
4a6ffcba3d7f: Pull complete
Digest: sha256:690886e7d513b6ca46acb95dac27120f985f043b4fd6e66a6c9f35a68431dcf0
Status: Downloaded newer image for jojomi/hugo:latest
WARNING: Site config's rssURI is deprecated and will be removed in a future release. Set baseName in outputFormats.RSS.
Started building sites ...
ERROR 2017/04/14 02:11:09 Error while rendering "page": template: post/single.html:1:3: executing "post/single.html" at <partial "header.html...>: error calling partial: template: theme/partials/header.html:4:3: executing "theme/partials/header.html" at <partial "head.html" ...>: error calling partial: template: theme/partials/head.html:36:8: executing "theme/partials/head.html" at <.RSSlink>: can't evaluate field RSSlink in type *hugolib.PageOutput
ERROR: Job failed: exit code 255