Impossible to launch the site

[stevegnr]

Hello,

Yesterday I created 2 Gatsby sites using your lib, thanks ! However since, I cannot create another one, nor launching previous ones. This is what I get when following the lib instructions :
cd gatsby-starter-markdown
yarn gatsby develop

Node.js v18.0.0

success open and validate gatsby-configs - 0.091s
success load plugins - 2.175s
success onPreInit - 0.065s
success initialize cache - 0.016s
success copy gatsby files - 0.237s
success onPreBootstrap - 0.104s
success createSchemaCustomization - 0.270s
success Checking for changed pages - 0.008s
success source and transform nodes - 0.227s
success building schema - 0.449s
info Total nodes: 82, SitePage nodes: 9 (use --verbose for breakdown)
success createPages - 0.066s
success Checking for changed pages - 0.001s
success createPagesStatefully - 0.117s
success update schema - 0.040s
success write out redirect data - 0.002s
success Build manifest and related icons - 0.207s
success onPostBootstrap - 0.220s
info bootstrap finished - 8.944s
success onPreExtractQueries - 0.006s
success extract queries from components - 3.715s
success write out requires - 0.028s
success run static queries - 0.046s - 3/3 65.76/s
success run page queries - 0.023s - 2/2 87.71/s

ERROR

error:0308010C:digital envelope routines::unsupported

Error: error:0308010C:digital envelope routines::unsupported

• hash:67 new Hash
  node:internal/crypto/hash:67:19

• node:crypto:133 Object.createHash
  node:crypto:133:10

• createHash.js:135 module.exports
  [gatsby-starter-markdown]/[webpack]/lib/util/createHash.js:135:53

• NormalModule.js:417 NormalModule._initBuildHash
  [gatsby-starter-markdown]/[webpack]/lib/NormalModule.js:417:16

• NormalModule.js:471 handleParseError
  [gatsby-starter-markdown]/[webpack]/lib/NormalModule.js:471:10

• NormalModule.js:503
  [gatsby-starter-markdown]/[webpack]/lib/NormalModule.js:503:5

• NormalModule.js:358
  [gatsby-starter-markdown]/[webpack]/lib/NormalModule.js:358:12

• LoaderRunner.js:373
  [gatsby-starter-markdown]/[loader-runner]/lib/LoaderRunner.js:373:3

• LoaderRunner.js:214 iterateNormalLoaders
  [gatsby-starter-markdown]/[loader-runner]/lib/LoaderRunner.js:214:10

• LoaderRunner.js:221 iterateNormalLoaders
  [gatsby-starter-markdown]/[loader-runner]/lib/LoaderRunner.js:221:10

• LoaderRunner.js:236
  [gatsby-starter-markdown]/[loader-runner]/lib/LoaderRunner.js:236:3

• LoaderRunner.js:111 context.callback
  [gatsby-starter-markdown]/[loader-runner]/lib/LoaderRunner.js:111:13

• index.js:44
  [gatsby-starter-markdown]/[babel-loader]/lib/index.js:44:71

not finished Building development bundle - 1.346s

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Thank you for your help