Add WebP support

[harryhorton]

Please include support for WebP. Since docker-php-ext-configure gd is run in this image before being used by Laradock's php-fpm docker image within the repo, it'd be helpful to include webp as an option here.

This is what I reran in the other dockerfile to get webp support added.

RUN docker-php-ext-configure gd \
  --enable-gd-native-ttf \
  --with-jpeg-dir=/usr/lib \
  --with-webp-dir=/usr/lib \
  --with-freetype-dir=/usr/include/freetype2 && \
  docker-php-ext-install gd```

[qiuyimo]

Please add --with-webp-dir=/usr/lib.

[Trixpua]

Any news about this issue?

[tmtung144]

up