rsync your code into docker container. Instead of direct mounting to the WORKDIR mount somewhere else an sync it to avoid permission override issue leading to permission denied errors in the container.

Dockerfile.rsync

# Use a Debian base image
FROM debian:latest
ARG USERNAME=debian

# Define environment variables
ENV SOURCE_CODE_VOLUME_MOUNT="/host-code" \
    WORKING_DIR="/app"

# Install rsync, make, nano, and procps
RUN apt-get update \
    && apt-get install -y rsync procps make nano  \
    && rm -rf /var/lib/apt/lists/*

## create a non-root user for security
RUN useradd -m -s /bin/bash $USERNAME

WORKDIR /app
RUN chown -R $USERNAME:$USERNAME ./

# Set up directories
RUN mkdir /host-code

# Create rsync script
RUN echo '#!/bin/bash' > /usr/local/bin/rsync_source \
    && echo 'rsync -ha --exclude=log --exclude=public/packs --exclude=node_modules --exclude=tmp --exclude=.git --exclude=mysql --exclude=.env "${SOURCE_CODE_VOLUME_MOUNT}/." "${WORKING_DIR}/."' >> /usr/local/bin/rsync_source \
    && chmod +x /usr/local/bin/rsync_source

# Set up continuous sync loop
RUN echo '#!/bin/bash' > /usr/local/bin/dev_sync.sh \
    && echo 'while true; do /usr/local/bin/rsync_source; echo "sources synced."; sleep 3; done' >> /usr/local/bin/dev_sync.sh \
    && chmod +x /usr/local/bin/dev_sync.sh

# Define dev_sync and dev_sync_kill commands
RUN echo '#!/bin/bash' > /usr/local/bin/dev_sync \
    && echo '/usr/local/bin/dev_sync.sh > /dev/null 2>&1 &' >> /usr/local/bin/dev_sync \
    && echo '#!/bin/bash' > /usr/local/bin/dev_sync_kill \
    && echo 'pkill -f "/usr/local/bin/dev_sync.sh"' >> /usr/local/bin/dev_sync_kill \
    && chmod +x /usr/local/bin/dev_sync /usr/local/bin/dev_sync_kill

USER $USERNAME

CMD ["/bin/bash"]