some composer commands have no effect or break docker-compose

[pr1ntr]

here is my dockerfile (edited version of yours)

MAINTAINER WILDLIFE "develop@wildlife.la"



# Remove existing webroot, configure PHP session handler for Redis, install postgresql-client (pg_dump)
RUN rm -rf /usr/share/nginx/* && \
sed -i -e "s/memory_limit\s*=\s*.*/memory_limit = 256M/g" ${php_conf} && \
sed -i -e "s/session.save_handler\s*=\s*.*/session.save_handler = redis/g" ${php_conf} && \
sed -i -e "s/;session.save_path\s*=\s*.*/session.save_path = \"\${REDIS_PORT_6379_TCP}\"/g" ${php_conf} && \
wget -q -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - && \
sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt/ `lsb_release -cs`-pgdg main" >> /etc/apt/sources.list.d/pgdg.list' && \
apt-get update && \
apt-get install -y postgresql-client-10 net-tools php7.2-xdebug



# Create Craft project

WORKDIR /usr/share/nginx/

RUN composer create-project craftcms/craft .


VOLUME /usr/share/nginx/modules
VOLUME /usr/share/nginx/plugins



# Install the yii2-redis library
RUN composer require --prefer-dist yiisoft/yii2-redis
# THIS DOES NOTHING
RUN composer config repositories.buildhooks '{"type": "path", "url": "./plugins/wildlife/buildhooks"}'
# THIS BREAKS THE BUILD
RUN composer require wildlife/buildhooks

# Add default craft cms nginx config
ADD ./default.conf /etc/nginx/conf.d/default.conf

# Add database environment
ADD .env.sample /usr/share/nginx/.env

# Add default config
ADD ./config /usr/share/nginx/config




RUN chown -Rf nginx:nginx /usr/share/nginx/

RUN chmod 666 /etc/hosts 
RUN echo $(netstat -nr | grep '^0\.0\.0\.0' | awk '{print $2}') dockerhost >> /etc/hosts 
RUN chmod 644 /etc/hosts



EXPOSE 80
EXPOSE 9000

The composer config command does nothing
The composer require command breaks outright with this message

  [InvalidArgumentException]
  Could not find a matching version of package wildlife/buildhooks. Check the package spelling, your version constraint and that the package is available in a stability which matches your minimum-stability (stable).

I think it may have something to do with the plugins being loaded as a volume but the composer config command does nothing either.