Thanks Yanokwa. We did not make any changes to the install. Our .env is reproduced below
DOMAIN=dfdfdfdfdf.dfdfdfdfd.edu
SYSADMIN_EMAIL=dfdfdfdf@dfdfdfdf.edu
SSL_TYPE=upstream
HTTP_PORT=80
HTTPS_PORT=443
# Optional: configure a custom mail server
EMAIL_FROM= dfdfdf@dfdfdfdf.dfdfdf
EMAIL_HOST=dfdfdfdfdf.zoho.in
EMAIL_PORT=465
EMAIL_SECURE=true
EMAIL_IGNORE_TLS=false
EMAIL_USER=dfdfdf@dfdfdfdf.dfdfdfdf
EMAIL_PASSWORD=dfdfdfdfdfdfdfdfdf
docker-compose is as per standard from the github repo