From ad2d6877e59094342414cdbac1d01e21b825446d Mon Sep 17 00:00:00 2001
From: Ethan Paul <e@enp.one>
Date: Wed, 10 Apr 2024 19:06:45 -0400
Subject: [PATCH] Add dockerfile for building custom nginx container

Add entrypoint that calls envsubst ahead of starting nginx
---
 nginx/Dockerfile           | 10 ++++++++++
 nginx/docker-entrypoint.sh | 16 ++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 nginx/Dockerfile
 create mode 100755 nginx/docker-entrypoint.sh

diff --git a/nginx/Dockerfile b/nginx/Dockerfile
new file mode 100644
index 0000000..6ad0d66
--- /dev/null
+++ b/nginx/Dockerfile
@@ -0,0 +1,10 @@
+FROM docker.io/library/nginx:latest
+
+ENV NEXTCLOUD_DOMAIN=example.com
+ENV NEXTCLOUD_PHP_FPM_HOST=php-fpm-nextcloud:9000
+ENV NEXTCLOUD_MAX_UPLOAD_SIZE=512M
+
+ADD nginx.conf.template /nginx.conf.template
+ADD docker-entrypoint.sh /docker-entrypoint.sh
+
+ENTRYPOINT ["sh", "-c", "/docker-entrypoint.sh"]
diff --git a/nginx/docker-entrypoint.sh b/nginx/docker-entrypoint.sh
new file mode 100755
index 0000000..be6d293
--- /dev/null
+++ b/nginx/docker-entrypoint.sh
@@ -0,0 +1,16 @@
+#/usr/bin/env bash
+
+# This implementation is adapted from the solution proposed here:
+# https://stackoverflow.com/questions/21866477/nginx-use-environment-variables
+
+# envsubst will take the input and replace all references to environment
+# variables with their corresponding value. Because nginx uses the same
+# '$' prefix for its internal variables, we should explicitly define the
+# variables we want to replace rather than replacing all env vars.
+envsubst '
+$NEXTCLOUD_PHP_FPM_HOST
+$NEXTCLOUD_DOMAIN
+$NEXTCLOUD_MAX_UPLOAD_SIZE
+' < /nginx.conf.template > /etc/nginx/nginx.conf
+
+exec nginx -g 'daemon off;'