Add gpg package installation

.space/Dockerfile

@@ -0,0 +1,14 @@
+FROM ghcr.io/open-webui/open-webui:main
+
+# Install gpg
+USER root
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends gpg && \
+    rm -rf /var/lib/apt/lists/* && \
+    gpg --version  # Verify installation
+
+# Set correct permissions
+RUN mkdir -p /app/backend/db_backup && \
+    chown -R 1000:1000 /app/backend/db_backup
+
+USER 1000