Box documentation notes

Build

-----

**Note:** Building manually requires Docker 18.09 or later with the 

[Buildkit][] feature enabled.

> **Note:** Building manually requires Docker 18.09 or later with the 

> [Buildkit][] feature enabled.

To build the PHP-FPM image run:

An array of "key=value" strings declaring [PHP directives][].

**Note:** These values may alternatively be supplied as container command 

arguments prefixed with the '-d' flag:

`-d upload_max_filesize=20M -d post_max_size=20M`

> **Note:** These values may alternatively be supplied as container command 

> arguments preceded by the '-d' flag:

> `-d upload_max_filesize=20M -d post_max_size=20M`

### STATIC_PATTERNS

This is an array of shell wildcard patterns (non-GNU extensions) matching 

files which will NOT be copied to the static files directory.

**Note:** Files with a .php extension are never copied to the static files 

directory.

> **Note:** Files with a .php extension are never copied to the static files 

> directory.

### THEMES