Using System Env In Nginx Config using system env in nginx config

sed -e "s,`echo '$OPENSHIFT_REPO_DIR'`,`echo $OPENSHIFT_REPO_DIR`," \
    -e "s,`echo '$OPENSHIFT_DIY_IP'`,`echo $OPENSHIFT_DIY_IP`," \
    -e "s,`echo '$OPENSHIFT_DIY_PORT'`,`echo $OPENSHIFT_DIY_PORT`," \
    -e "s,`echo '$OPENSHIFT_MYSQL_DB_PORT'`,`echo $OPENSHIFT_MYSQL_DB_PORT`," \
    -e "s,`echo '$OPENSHIFT_MYSQL_DB_HOST'`,`echo $OPENSHIFT_MYSQL_DB_HOST`," \
    -e "s,`echo '$OPENSHIFT_MYSQL_DB_PASSWORD'`,`echo $OPENSHIFT_MYSQL_DB_PASSWORD`," \
    -e "s,`echo '$OPENSHIFT_MYSQL_DB_USERNAME'`,`echo $OPENSHIFT_MYSQL_DB_USERNAME`," \
    $OPENSHIFT_REPO_DIR/.openshift/action_hooks/nginx.conf.template \
    > $OPENSHIFT_DATA_DIR/nginx/conf/nginx.conf