fix: enable IPv6 dual-stack for OSS, Plus, and unprivileged images (#483)

* Add IPv6 support to default.conf.template for OSS/Plus images

The OSS and Plus base images were missing IPv6 support.
The nginx base image's IPv6 enabler script modifies /etc/nginx/conf.d/default.conf,
but the template processing (which runs after) overwrites this file,
removing the IPv6 listen directive.

This fix adds both IPv4 and IPv6 listen directives directly to the
source template, ensuring they are present in the final configuration
for OSS and Plus image variants.

Fixes #453

Signed-off-by: Jesse Awan <[email protected]>

* Add IPv6 support to unprivileged Docker image

The unprivileged image needs to replace port 80 with port 8080
(since unprivileged users cannot bind to port 80).

This fix modifies the sed commands to replace the port 80 listen
directives (both IPv4 and IPv6) with port 8080 equivalents,
ensuring dual-stack support without privilege issues.

Fixes #339

Signed-off-by: Jesse Awan <[email protected]>

---------

Signed-off-by: Jesse Awan <[email protected]>

Author: I501307

Dockerfile.unprivileged

@@ -6,7 +6,8 @@
 FROM nginx-s3-gateway
 
 # Implement changes required to run NGINX as an unprivileged user
-RUN sed -i "/^server {/a \    listen       8080;" /etc/nginx/templates/default.conf.template \
+RUN sed -i 's/listen[[:space:]]*80;/listen 8080;/g' /etc/nginx/templates/default.conf.template \
+    && sed -i 's/listen[[:space:]]*\[::\]:80;/listen [::]:8080;/g' /etc/nginx/templates/default.conf.template \
     && sed -i '/user  nginx;/d' /etc/nginx/nginx.conf \
     && sed -i 's#http://127.0.0.1:80#http://127.0.0.1:8080#g' /etc/nginx/include/s3gateway.js \
     && sed -i 's,/var/run/nginx.pid,/tmp/nginx.pid,' /etc/nginx/nginx.conf \

common/etc/nginx/templates/default.conf.template

@@ -32,6 +32,8 @@ js_set $awsSessionToken awscredentials.sessionToken;
 js_set $s3uri s3gateway.s3uri;
 
 server {
+    listen       80;
+    listen       [::]:80;
     include /etc/nginx/conf.d/gateway/server_variables.conf;
 
     # Don't display the NGINX version number because we don't want to reveal