From 99562e78b295ff38ef9f5a069c49b93f82817f78 Mon Sep 17 00:00:00 2001 From: afilichev Date: Tue, 9 Jun 2026 15:37:28 +0300 Subject: [PATCH] Add missing documentation for NGINX_ENVSUBST_FILTER environment variable --- nginx/content.md | 3 +++ 1 file changed, 3 insertions(+) diff --git a/nginx/content.md b/nginx/content.md index 65fb24e8c90e..f36a1cd38c19 100644 --- a/nginx/content.md +++ b/nginx/content.md @@ -112,6 +112,9 @@ This behavior can be changed via the following environment variables: - The output filename is the template filename with the suffix removed. - ex.) `/etc/nginx/templates/default.conf.template` will be output with the filename `/etc/nginx/conf.d/default.conf`. - This directory must be writable by the user running a container. +- `NGINX_ENVSUBST_FILTER` + - A regular expression to filter environment variable names passed to `envsubst` (default: empty string) + - When set, only variables whose names match this pattern are available for substitution. ## Running %%IMAGE%% in read-only mode