Merge pull request #243 from jlsalmon/master

fix: ensure copied source has correct ownership

Author: Paul "TBBle" Hampson

ue4docker/dockerfiles/ue4-source/linux/Dockerfile

@@ -15,7 +15,7 @@ ARG VERBOSE_OUTPUT=0
 
 # Copy the Unreal Engine source code from the host system
 ARG SOURCE_LOCATION
-COPY ${SOURCE_LOCATION} /home/ue4/UnrealEngine
+COPY --chown=ue4:ue4 ${SOURCE_LOCATION} /home/ue4/UnrealEngine
 
 {% else %}