CI builds are failing due to ERR_OSSL_EVP_UNSUPPORTED.

[adunkman]

Describe the bug
There is an issue with hashing algorithms in Webpack 4 and Node versions 17 and above, due to Node’s migration to OpenSSL3. It’s documented at webpack/webpack#14532 — and all recent builds on this repo are failing due to the issue.

Builds fail with:

Error: error:0308010C:digital envelope routines::unsupported
    at new Hash (node:internal/crypto/hash:67:19)
    at Object.createHash (node:crypto:133:10)
    at module.exports (/home/runner/work/netlify-cms/netlify-cms/node_modules/webpack/lib/util/createHash.js:135:53)
    at NormalModule._initBuildHash (/home/runner/work/netlify-cms/netlify-cms/node_modules/webpack/lib/NormalModule.js:417:16)
    at handleParseError (/home/runner/work/netlify-cms/netlify-cms/node_modules/webpack/lib/NormalModule.js:471:10)
    at /home/runner/work/netlify-cms/netlify-cms/node_modules/webpack/lib/NormalModule.js:503:5
    at /home/runner/work/netlify-cms/netlify-cms/node_modules/webpack/lib/NormalModule.js:358:12
    at /home/runner/work/netlify-cms/netlify-cms/node_modules/loader-runner/lib/LoaderRunner.js:373:3
    at iterateNormalLoaders (/home/runner/work/netlify-cms/netlify-cms/node_modules/loader-runner/lib/LoaderRunner.js:214:10)
    at iterateNormalLoaders (/home/runner/work/netlify-cms/netlify-cms/node_modules/loader-runner/lib/LoaderRunner.js:221:10)
    at /home/runner/work/netlify-cms/netlify-cms/node_modules/loader-runner/lib/LoaderRunner.js:236:3
    at context.callback (/home/runner/work/netlify-cms/netlify-cms/node_modules/loader-runner/lib/LoaderRunner.js:111:13)
    at /home/runner/work/netlify-cms/netlify-cms/node_modules/babel-loader/lib/index.js:59:71 {
  opensslErrorStack: [ 'error:03000086:digital envelope routines::initialization error' ],
  library: 'digital envelope routines',
  reason: 'unsupported',
  code: 'ERR_OSSL_EVP_UNSUPPORTED'
}

Example pull requests which have failed with this error:

• feat(nested collections): allow additional content in flatter structure #6498
• feat: add react 18 as a peer dependency #6496
• fix: sets a limit for editor minSize in editor split view #6492

To Reproduce

1. Make a change (the changeset is not relevant)
2. Open a pull request
3. Observe build failure

Applicable Versions:

• webpack@4
• nodejs@17 and above

[adunkman]

The issue above suggests the possible paths forward:

1. Remain on webpack@4, but supply --openssl-legacy-provider to nodejs:

   export NODE_OPTIONS=--openssl-legacy-provider

2. Upgrade to webpack@5.

[martinjagodic]

This is fixed