fix: add public dir and fix Dockerfile COPY syntax for dashboard

Author: epappas

dashboard/Dockerfile

@@ -42,7 +42,7 @@ ENV PORT=3000
 RUN addgroup --system --gid 1001 nodejs && \
     adduser --system --uid 1001 nextjs
 
-COPY --from=builder /app/public ./public 2>/dev/null || true
+COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static