ERR_UNKNOWN_FILE_EXTENSION Installation / Build Error

[jschappet]

I'm attempting to build and install on Ubuntu 22.04.5 LTS

root@www:/opt/codexdocs# uname -an
Linux www 5.15.0-156-generic #166-Ubuntu SMP Sat Aug 9 00:02:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux

root@www:/opt/codexdocs# npm -v
10.8.2
root@www:/opt/codexdocs# node -v
v18.20.8

With 'yarn && yarn start' I get the following error:

[0] [nodemon] starting ts-node src/backend/app.ts -c docs-config.yaml -c docs-config.local.yaml
[0] TypeError [ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension ".ts" for /opt/codexdocs/src/backend/app.ts
[0] at new NodeError (node:internal/errors:405:5)
[0] at Object.getFileProtocolModuleFormat [as file:] (node:internal/modules/esm/get_format:136:11)
[0] at defaultGetFormat (node:internal/modules/esm/get_format:182:36)
[0] at defaultLoad (node:internal/modules/esm/load:101:20)
[0] at nextLoad (node:internal/modules/esm/hooks:864:28)
[0] at load (/opt/codexdocs/node_modules/ts-node/dist/child/child-loader.js:19:122)
[0] at nextLoad (node:internal/modules/esm/hooks:864:28)
[0] at Hooks.load (node:internal/modules/esm/hooks:447:26)
[0] at MessagePort.handleMessage (node:internal/modules/esm/worker:196:24)
[0] at [nodejs.internal.kHybridDispatch] (node:internal/event_target:786:20) {
[0] code: 'ERR_UNKNOWN_FILE_EXTENSION'
[0] }
[0] [nodemon] app crashed - waiting for file changes before starting...

[neSpecc]

@jschappet please test in copilot/fix-unknown-file-extension-error branch

[jschappet]

Yes, that version is building. Thank you!