Improve production stability by fixing backup directory permissions

Adjust Dockerfile to create and grant permissions for backup directories, install PostgreSQL client for backups, and update BackupService to use the correct production backup path to resolve EACCES errors.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 7c468936-2a88-4686-ac0a-84921a45222d
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/7c468936-2a88-4686-ac0a-84921a45222d/K3Lzcje

Dockerfile

@@ -84,8 +84,8 @@ COPY --from=build --chown=nextjs:nodejs /app/shared ./shared
 # Create symlink for public files to be accessible from dist
 RUN ln -sf /app/dist/public /app/dist/public
 
-# Create uploads directory with proper permissions
-RUN mkdir -p /app/uploads && chown -R nextjs:nodejs /app/uploads
+# Create uploads and backups directories with proper permissions
+RUN mkdir -p /app/uploads /app/backups && chown -R nextjs:nodejs /app/uploads /app/backups
 
 # Switch to non-root user
 USER nextjs
@@ -94,9 +94,9 @@ USER nextjs
 EXPOSE 3000
 ENV PORT=3000
 
-# Install wget for health check
+# Install wget for health check and postgresql-client for pg_dump
 USER root
-RUN apk add --no-cache wget
+RUN apk add --no-cache wget postgresql-client
 USER nextjs
 
 # Health check