fix: Update user ID in Dockerfile for non-root user

Author: ElementTech

Dockerfile

@@ -20,8 +20,8 @@ COPY src/ ./src/
 RUN mkdir -p /app/config
 
 # Create non-root user
-RUN addgroup -g 1000 -S nodejs && \
-    adduser -S slaking -u 1000
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S slaking -u 1001 -G nodejs
 
 # Change ownership of the app directory
 RUN chown -R slaking:nodejs /app