Increase the hash bucket size, in order to allow the long AWS hostname.

This commit refs #153.
Modify the wordpress nginx configuration.

Modify the wordpress nginx configuration,
in order to allow the flexible customization.

This commit refs #153.
Modify the node data to install sansakizaka-demo wordpress site.

This commit fixes #153.
Merge branch 'id/153' into dev
Merge commit '45814007a1222fd93dc2ca2edc83e62423d13f95' into HEAD