Add support equations

Dockerfile

@@ -3,6 +3,7 @@ FROM centos/nginx-114-centos7
 ENV NAME="MkDocs" \
     MKDOCS_VERSION="1.0.4" \
     MATERIAL_VERSION="4.4.2" \
+    PYMDOWN_EXTENSION_VERSION="6.3" \
     SUMMARY="Platform for building and running MkDocs static sites." \
     DESCRIPTION="MkDocs is a fast, simple and downright gorgeous \
 static site generator that's geared towards building project documentation. \
@@ -24,13 +25,15 @@ LABEL maintainer="CERN Authoring <authoring@cern.ch>" \
 USER root
 
 # Install the latest available Python and pip for CentOS 7
-# as well as the specified version of MkDocs and the Material theme.
+# as well as the specified version of MkDocs, Material theme and 
+# pymdown-extensions https://squidfunk.github.io/mkdocs-material/extensions/pymdown/ .
 RUN yum install -y rh-python36-python-pip && \
     yum clean all && \
     /opt/rh/rh-python36/root/usr/bin/pip install --cache-dir /root --upgrade pip && \
     /opt/rh/rh-python36/root/usr/bin/pip install --cache-dir /root \
         mkdocs==${MKDOCS_VERSION} \
-        mkdocs-material==${MATERIAL_VERSION}
+        mkdocs-material==${MATERIAL_VERSION} \
+        pymdown-extensions==${PYMDOWN_EXTENSION_VERSION}
 
 # Move the original assemble script to another file
 # and copy our custom assemble script.