Fix ESLint configuration for Docker build

- Remove ignoreDuringBuilds from eslintConfig in package.json (invalid)
- Add eslint.ignoreDuringBuilds to next.config.js (correct location)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

next.config.js

@@ -6,6 +6,9 @@ const withBundleAnalyzer = require('@next/bundle-analyzer')({
 });
 
 module.exports = withBundleAnalyzer({
+  eslint: {
+    ignoreDuringBuilds: true,
+  },
   webpack: (config) => {
     // for dynamic loading of auth providers
     config.experiments = { ...config.experiments, topLevelAwait: true };