fix: allow setting of PUID and PGID to prevent permission issues when using NFS mounts or shared volumes

docker/Dockerfile

@@ -17,6 +17,10 @@ COPY ${TARGETARCH}/LICENSE /opt/bichon/
 # Set proper permissions
 RUN chmod +x /opt/bichon/bichon
 
+# Copy and setup entrypoint script for PUID/PGID support
+COPY docker/entrypoint.sh /usr/local/bin/entrypoint.sh
+RUN chmod +x /usr/local/bin/entrypoint.sh
+
 # Install ca-certificates to ensure HTTPS certificate verification works correctly
 RUN apt update && apt install -y ca-certificates curl && rm -rf /var/lib/apt/lists/*
 # Create data directory
@@ -31,5 +35,6 @@ WORKDIR /data
 HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
   CMD curl -fs http://localhost:15630/api/status || exit 1
 
-# Entrypoint remains the binary
+# Entrypoint with PUID/PGID support
+ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
 CMD ["/opt/bichon/bichon"]