Fix logging commits in docker-container dev env
    
    This fixes up several problems with logging commits in the
    docker dev env. We did not have an equivalent of pagure_logcom
    running at all, first of all. There were also several issues
    preventing the default commit hook from running properly. The
    file is not executable, which meant the hook wouldn't be run
    at all (@cverna noticed this). PYTHONPATH not being set as an
    env var in the web container meant the hook couldn't find the
    pagure module. And PAGURE_CONFIG not being set as an env var in
    the web container meant the hook couldn't find the correct
    pagure config file for the dev environment.
    
    With all these things fixed, if you clone a repo from the dev
    instance *inside* the web container (it currently only works
    that way) and then push a commit to it (using an email address
    associated with a user that exists), the hook runs, and the
    commit is properly logged to the database, and shows up in the
    user's activity log.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>