Make Nginx IPv6 enable by default but can be disable through ENV var

entrypoint.sh

@@ -30,9 +30,14 @@ if [[ -z "$SSO_CLIENT_ID" ]]; then
   exit 1
 fi
 
+export LISTEN_IPV6="listen       [::]:8080 default_server;"
+if [ "$DISABLE_IPV6" = true ] ; then
+  export LISTEN_IPV6="# ${LISTEN_IPV6}"
+fi
+
 if [ -f ./nginx.conf.template ]; then
   echo "---> Processing nginx.conf.template configuration file..."
-  envsubst '${CONTROLS_API_URL} ${SSO_SERVER_URL} ${APPLICATION_INVENTORY_API_URL} ${PATHFINDER_API_URL}' < ./nginx.conf.template > ./nginx.conf
+  envsubst '${LISTEN_IPV6} ${CONTROLS_API_URL} ${SSO_SERVER_URL} ${APPLICATION_INVENTORY_API_URL} ${PATHFINDER_API_URL}' < ./nginx.conf.template > ./nginx.conf
   cp -v ./nginx.conf "${NGINX_CONF_PATH}"
   rm -f ./nginx.conf
 fi

nginx.conf.template

@@ -40,7 +40,7 @@ http {
 
     server {
         listen       8080 default_server;
-        listen       [::]:8080 default_server;
+        ${LISTEN_IPV6}
         server_name  _;
         root         /opt/app-root/src;