fix: add webpack config override to resolve punycode polyfill for Strapi admin panel build

Dockerfile

@@ -20,10 +20,11 @@ RUN node -e " \
 "
 
 RUN npm install --legacy-peer-deps
-RUN npm install --save pg@8.11.3
+RUN npm install --save pg@8.11.3 punycode
 
 COPY config/database.js ./config/database.js
 COPY config/server.js   ./config/server.js
+COPY src/admin/webpack.config.js ./src/admin/webpack.config.js
 COPY docker-entrypoint.sh /docker-entrypoint.sh
 RUN chmod +x /docker-entrypoint.sh
 

src/admin/webpack.config.js

@@ -0,0 +1,11 @@
+'use strict';
+
+// Fix: webpack5 does not include Node.js core polyfills by default
+// markdown-it requires 'punycode' which is a deprecated Node.js built-in
+module.exports = (config) => {
+  config.resolve.fallback = {
+    ...(config.resolve.fallback || {}),
+    punycode: require.resolve('punycode/'),
+  };
+  return config;
+};