You need build PearProject docker image.
choise php version , and cd to dir.
# build
docker build -t pear-docker:1.0.0 .
# cd to root path
cd ../..
# attach container install composer vendor
docker run --rm -it --mount type=bind,source="$(pwd)",target=/app pear-docker:1.0.0 /bin/bash
composer install
exit
# run your docker
docker run --mount type=bind,source="$(pwd)",target=/app -p 1234:8081 pear-docker:1.0.0
Right , now visit http://127.0.0.1:1234