Fix media upload

[derekherman]

Currently you cannot upload media to the container.

[kasparsd]

This has been fixed in #25 by mapping /var/www/html/wp-content to the named volume instead of the site root /var/www/html:

block-scaffolding-wp/docker-compose.yml

Line 24 in 6663d05

- wp_data:/var/www/html/wp-content

See this blog post for why that solves this known problem with the standard WP image.

[derekherman]

@kasparsd did you confirm this was working. I am not able to upload.