php-worker install ImageMagick, the number supported format is 0

[niming175]

Description:

I set PHP_WORKER_INSTALL_IMAGEMAGICK =true to install ImageMagick extension on the php-work， but on my project about imagick function can't work！

Expected Behavior:

1、after build, enter the box of php-worker
2、input php --ri imagick , found the ImageMagick supported formats is 0;

3、I add code imagemagick solved the proplem

#Install ImageMagick:
ARG INSTALL_IMAGEMAGICK=false
ARG IMAGEMAGICK_VERSION=latest
ENV IMAGEMAGICK_VERSION ${IMAGEMAGICK_VERSION}
RUN set -eux; \
  if [ ${INSTALL_IMAGEMAGICK} = true ]; then \
    apk add --update --no-cache imagemagick-dev  imagemagick; \
    ...

Context information:

Output of git rev-parse HEAD

{paste here}

Output of docker version
v11.0

{paste here}

Output of docker-compose version

{paste here}

System info: Mac, Windows or Linux. Include which disto/version

{paste here}

Steps to reproduce the issue:

Stacktrace & Additional info:

{paste here}