containers - use python hack to get env var values from string

helpers/entrypoint.sh

@@ -61,7 +61,8 @@ if [ "$SWARM_MODE" != "yes" ] && [ "$KUBERNETES_MODE" != "yes" ] && [ "$AUTOCONF
 		fi
 		target="${target}${name}.conf"
 		log "ENTRYPOINT" "ℹ️" "Saving custom config to $target ..."
-		echo "${!var_name}" > "$target"
+        content=$(python3 -c "import os ; print(os.environ['${var_name}'])")
+		echo "${content}" > "$target"
 	done
 
 	# execute temp nginx with no server

helpers/utils.sh

@@ -56,7 +56,8 @@ function get_env() {
 for var_name in $(python3 -c 'import os ; [print(k) for k in os.environ]') ; do
 	filter=$(echo -n "$var_name" | sed -r 's/^(HOSTNAME|PWD|PKG_RELEASE|NJS_VERSION|SHLVL|PATH|_|NGINX_VERSION|HOME|([a-z\.\-]*)_?CUSTOM_CONF_(HTTP|DEFAULT_SERVER_HTTP|SERVER_HTTP|MODSEC|MODSEC_CRS)_(.*))$//g')
 	if [ "$filter" != "" ] ; then
-		echo "${var_name}=${!var_name}"
+        var_value=$(python3 -c "import os ; print(os.environ['${var_name}'])")
+		echo "${var_name}=${var_value}"
 	fi
 done
 }