update docker file

Dockerfile

@@ -21,25 +21,23 @@ COPY VERSION .
 RUN mkdir -p /app/data && chown -R appuser:appuser /app
 
 # Root-aware entrypoint
-RUN cat > /entrypoint.sh << 'EOF'
-#!/bin/bash
-set -euo pipefail
-
-PUID=${PUID:-1000}
-PGID=${PGID:-1000}
-
-if [ "$(id -u)" -eq 0 ]; then
-  # running as root: we can adjust IDs and drop privileges
-  groupmod -o -g "$PGID" appuser 2>/dev/null || groupadd -o -g "$PGID" appuser
-  id appuser &>/dev/null || useradd -o -u "$PUID" -g "$PGID" -m appuser
-  usermod -o -u "$PUID" -g "$PGID" appuser 2>/dev/null || true
-  chown -R "$PUID:$PGID" /app || true
-  exec gosu appuser "$@"
-else
-  # not root (e.g., compose set user: 1000:1000) — just run
-  exec "$@"
-fi
-EOF
+RUN echo '#!/bin/bash' > /entrypoint.sh && \
+    echo 'set -euo pipefail' >> /entrypoint.sh && \
+    echo '' >> /entrypoint.sh && \
+    echo 'PUID=${PUID:-1000}' >> /entrypoint.sh && \
+    echo 'PGID=${PGID:-1000}' >> /entrypoint.sh && \
+    echo '' >> /entrypoint.sh && \
+    echo 'if [ "$(id -u)" -eq 0 ]; then' >> /entrypoint.sh && \
+    echo '  # running as root: we can adjust IDs and drop privileges' >> /entrypoint.sh && \
+    echo '  groupmod -o -g "$PGID" appuser 2>/dev/null || groupadd -o -g "$PGID" appuser' >> /entrypoint.sh && \
+    echo '  id appuser &>/dev/null || useradd -o -u "$PUID" -g "$PGID" -m appuser' >> /entrypoint.sh && \
+    echo '  usermod -o -u "$PUID" -g "$PGID" appuser 2>/dev/null || true' >> /entrypoint.sh && \
+    echo '  chown -R "$PUID:$PGID" /app || true' >> /entrypoint.sh && \
+    echo '  exec gosu appuser "$@"' >> /entrypoint.sh && \
+    echo 'else' >> /entrypoint.sh && \
+    echo '  # not root (e.g., compose set user: 1000:1000) — just run' >> /entrypoint.sh && \
+    echo '  exec "$@"' >> /entrypoint.sh && \
+    echo 'fi' >> /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 
 HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \