Resolve copying recursively issue (SonarQube)

[mfarina1]

Following the results of the SonarQube scans, the following files need to be updated to resolve the found security hotspot of "Copying recursively might inadvertently add sensitive data to the container. Make sure it is safe here". See more details on the SonarQube site here

• transcoder/Dockerfile L28

[BrianSipos]

This will be overcome if #233 is accepted