Building API Plaform behind corporate proxy and injected certificate

[adurand-ctie]

API Platform version(s) affected: 3.2.16

Description
Error when executing corepack prepare --activate pnpm@latest:

Internal Error: Error when performing the request to https://registry.npmjs.org/pnpm; for troubleshooting help, see https://github.com/nodejs/corepack#troubleshooting
    at ClientRequest.<anonymous> (/usr/local/lib/node_modules/corepack/dist/lib/corepack.cjs:42195:14)
    at ClientRequest.emit (node:events:518:28)
    at TLSSocket.socketErrorListener (node:_http_client:495:9)
    at TLSSocket.emit (node:events:518:28)
    at emitErrorNT (node:internal/streams/destroy:169:8)
    at emitErrorCloseNT (node:internal/streams/destroy:128:3)
    at process.processTicksAndRejections (node:internal/process/task_queues:82:21)
The command '/bin/sh -c corepack prepare --activate pnpm@latest' returned a non-zero code: 1
ERROR: Service 'pwa' failed to build : Build failed

How to reproduce
docker-compose build --no-cache pwa behind corporate proxy and network appliance intercepting traffic.

Possible Solution
N/A

Additional Context
Since we are behind a corporate proxy, I added the following in the Dockerfile of pwa:

RUN set HTTP_PROXY=http://proxy.etat.lu:8080
RUN set HTTPS_PROXY=http://proxy.etat.lu:8080
RUN set ALL_PROXY=http://proxy.etat.lu:8080

For the "traffic interceptor" that watches the whole traffic, I added its certificate (already injected in the image):
RUN set NODE_EXTRA_CA_CERTS=/usr/local/share/ca-certificates/etat.crt
I even tried to disable TLS validation:
RUN set NODE_TLS_REJECT_UNAUTHORIZED=0

Any help on this issue would be highly appreciated :)
Thanks !