add intermediate certificate missing in dados.gov.br's chain

Author: augusto-herrmann

Dockerfile

@@ -81,3 +81,5 @@ RUN pip install --no-cache-dir --user 'apache-airflow[jdbc,microsoft.mssql,samba
     && pip install --no-cache-dir --user 'apache-airflow-providers-docker'==2.1.0 \
     && if [ -n "${PYTHON_DEPS}" ]; then pip install ${PYTHON_DEPS}; fi \
     && mkdir /opt/airflow/export-data
+RUN while [[ "$(curl -s -o /tmp/thawte.pem -w ''%{http_code}'' https://ssltools.digicert.com/chainTester/webservice/validatecerts/certificate?certKey=issuer.intermediate.cert.98&fileName=Thawte%20RSA%20CA%202018&fileExtension=txt)" != "200" ]]; do sleep 1; done
+RUN cat /tmp/thawte.pem >> /home/airflow/.local/lib/python3.7/site-packages/certifi/cacert.pem