Add logging-related keys to the example config. Use the same default for both.

.gitignore

 config.yml
 tmp/*
+*.log

config.yml.example

@@ -24,3 +24,8 @@ redis:
   # socket: /tmp/redis.socket # Only define this if you want to use sockets
   namespace: resque:gitlab
 
+# Log file.
+log_file: "/home/git/gitlab-shell/gitlab-shell.log"
+
+# Log level. INFO by default
+log_level: INFO

lib/gitlab_config.rb

@@ -32,7 +32,7 @@ class GitlabConfig
   end
 
   def log_file
-    @config['log_file'] ||= File.join(ROOT_PATH, 'log', 'gitlab_shell.log')
+    @config['log_file'] ||= File.join(ROOT_PATH, 'gitlab-shell.log')
   end
 
   def log_level