DevOps Engineer Documents Five Cascading Failures in Legacy CRA-Django Containerization
A developer recently undertook what appeared to be a routine task of containerizing a legacy Create React App frontend and Django backend for production deployment. The project's inherited Dockerfile was built for a Next.js app, requiring a full swap to an nginx static file server since CRA outputs a plain build directory, not a standalone Node server. Further issues included a mismatched package manager command, where an npm-style rebuild call was used in a Yarn Classic environment, and native modules compiled against Node 24 while the runtime stage used Node 22, risking silent ABI crashes in production. Upgrading to Node 17 or later also broke the build due to OpenSSL 3 deprecating legacy MD4 hashing used by Webpack 4 in react-scripts 4, fixed only by setting NODE_OPTIONS=--openssl-legacy-provider. A secondary breakage from postcss-safe-parser's undeclared package exports further illustrated how outdated transitive dependencies can fail silently in CI but crash in production.
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