Letsencrypt certificate verification failed after 09/30/2021

After 09/30/2021 I get certificate verification failed (DST Root CA X3 Expiration was on this date) when try auth
tornado.curl_httpclient.CurlError: HTTP 599: server certificate verification failed. CAfile: none CRLfile: none
i run jupyterhub on doker with treafic revers proxy and oauth authenticator (oidc keycloack)
jupyterhub 1.4.2
oauthenticator 14.2.0
OpenSSL 1.1.1f
Any ideas?

I add for fix

RUN apt-get update && apt-get install -yq --no-install-recommends \
    ca-certificates \
    libgnutls30 \
    && apt-get clean && rm -rf /var/lib/apt/lists/*

I’ve reported the issue at Expired certificates in the docker image · Issue #3666 · jupyterhub/jupyterhub · GitHub

The problem is that the base image (jupyterhub/jupyterhub) was updated before the certificate expired.

The images should be updated now

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