Update Dockerfile within projects subdirectory with the new repo file structure

projects/eos/Dockerfile

@@ -15,7 +15,7 @@ RUN sed -i '/^enabled=.*/a exclude=xrootd*' /etc/yum.repos.d/epel.repo
 RUN curl http://repository.egi.eu/sw/production/cas/1/current/repo-files/EGI-trustanchors.repo -o /etc/yum.repos.d/lcg-CA.repo
 
 # Add this repo for EOS dependencies
-ADD eos-docker/eos.repo /etc/yum.repos.d/
+ADD eos-docker/el-7/eos.repo /etc/yum.repos.d/
 
 # Install new EOS from created repo - the ADD command will reset the docker cache,
 # and any commands after that point will be uncached.