workaround fix for SSL issue

The underlying SSL issue appears to be tied to libgit2 library being unable to read a PEM file format, and hence errors. Workaround is to use

Author: rathod-b

julia_src/Dockerfile

@@ -5,6 +5,10 @@ ARG NREL_ROOT_CERT_URL_ROOT=""
 RUN set -x && if [ -n "$NREL_ROOT_CERT_URL_ROOT" ]; then curl -fsSLk -o /usr/local/share/ca-certificates/nrel_root.crt "${NREL_ROOT_CERT_URL_ROOT}/nrel_root.pem" && curl -fsSLk -o /usr/local/share/ca-certificates/nrel_xca1.crt "${NREL_ROOT_CERT_URL_ROOT}/nrel_xca1.pem" &&  update-ca-certificates; fi
 ENV REQUESTS_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt
 
+# Use git cli instead of Julia's libgit2, since we're facing SSL issues with it.
+RUN apt-get update && apt-get -y install git && rm -rf /var/lib/apt/lists/* /var/lib/dpkg/*-old /var/cache/* /var/log/*
+ENV JULIA_PKG_USE_CLI_GIT=true
+
 # Install Julia packages
 ENV JULIA_NUM_THREADS=2
 ENV XPRESS_JL_SKIP_LIB_CHECK=True