Docker automation setup.

* Dockerfile:
  ** Installs PHP-FPM, supervisord and some additional packages.
  ** Configures PHP-FPM pool.
  ** Configures supervisord.
  ** Adds command to run supervisord.
* supervisord.conf: supervisord configuration file.
* www.conf: PHP-FPM pool configuration file.
Corrected Dockerfile.
Fixed Dockerfile and www.conf.

PHP-FPM pool is now set with a default value.
Dockerfile creates run and log directories for PHP-FPM.