Fix path usage for docker
Commit from Mozilla Verbatim by user michael.koehler1@gmx.de.: 72 of 72 strings translated (0 fuzzy).
Commit from Mozilla Verbatim by user cesperanc@.: 71 of 71 strings translated (0 fuzzy).
Merge pull request #136 from muffinresearch/fix-paths-grunt-docker

Fix path usage for docker