Permission Denied on "docker compose exec --user alice app /bin/bash" - docker

Question

In my Dockerfile, I create a user, "alice" (generic name that isn't industry-specific) with a home directory. Alice has /home/.bashrc and root has /root/.bashrc (which all users can read - chmod a+r /root/bashrc).
I can run docker compose exec app /bin/bash and access the app container's command line as the root user. I can then su alice and have full access to the container as Alice.
However, if I run docker compose exec --user alice app /bin/bash, I get "bash: /root/.bashrc: Permission denied" followed by the "alice#sha:working/directory" cli prompt. ls ~/ gives the error: "ls: cannot open directory '/root/': Permission denied".
My docker-compose.yml file (abridged):
services:
app:
build:
context: ./docker/app
dockerfile: Dockerfile
args:
- HOST_GID=${HOST_GID}
- HOST_UID=${HOST_UID}
volumes:
${full_source_path}:/var/www/html
...
env_file: .env
My Dockerfile (abridged):
FROM --platform=$BUILDPLATFORM php:7.1-apache
# Set up Apache
RUN a2enmod rewrite
# UID & GID are passed in to use the same UID/GID as the host user's user account
ARG HOST_UID
ARG HOST_GID
RUN echo "Creating alice" && \
groupadd \
--force \
--gid ${HOST_GID} \
alice && \
sync && \
useradd \
--no-log-init \
--uid ${HOST_UID} \
--gid ${HOST_GID} \
--create-home \
--shell /bin/bash \
alice \
&& \
sync && \
echo "DONE"
# copy externally created files, including .bashrc, into /home/alice/
...
RUN chmod a+r /root/.bashrc
RUN chmod a+r /home/alice/.bashrc
RUN echo "Finalizing" && \
chown -R alice:alice /home/alice/ && \
echo "DONE"
COPY entrypoint.sh /entrypoint.sh
RUN chmod +x /entrypoint.sh
# Persist cached writes
RUN sync
WORKDIR /var/www/html
ENTRYPOINT ["/entrypoint.sh"]
My entrypoint.sh file:
#!/usr/bin/env bash
set -e
echo "Starting Apache"
exec apache2-foreground
echo "Container Ready"
sleep infinity
My host:
MacOS 12.4
Docker Desktop 4.10.1