Update Dockerfile to handle assets directory

Create assets directory and copy files into it.

Author: Mahmoud-Khawaja

frontend/Dockerfile

@@ -11,7 +11,9 @@ COPY index.html /usr/share/nginx/html/
 COPY pages /usr/share/nginx/html/pages
 COPY css /usr/share/nginx/html/css
 COPY js /usr/share/nginx/html/js
-COPY assets /usr/share/nginx/html/assets
+
+RUN mkdir -p /usr/share/nginx/html/assets
+COPY assets/* /usr/share/nginx/html/assets/ 2>/dev/null || true
 
 # Fix permissions
 RUN chown -R nginx:nginx /usr/share/nginx/html && \
@@ -34,4 +36,4 @@ HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
 EXPOSE 80
 
 # Start nginx in foreground
-CMD ["nginx", "-g", "daemon off;"]
+CMD ["nginx", "-g", "daemon off;"]