openvidu-deployment: Support machines with dual stack IPv4/IPv6 in nginx

openvidu-server/docker/openvidu-proxy/default.conf

@@ -1,5 +1,6 @@
 server {
     listen {http_port};
+    listen [::]:{http_port};
 
     location /.well-known/acme-challenge/ {
         root /var/www/certbot;

openvidu-server/docker/openvidu-proxy/default_nginx_conf/ce/default.conf

@@ -6,6 +6,7 @@ upstream openviduserver {
 
 server {
     listen {http_port};
+    listen [::]:{http_port};
     server_name {domain_name};
     
     # Redirect to https
@@ -27,6 +28,7 @@ server {
 
 server {
     listen {https_port} ssl;
+    listen [::]:{https_port} ssl;
     server_name {domain_name};
 
     {ssl_config}

openvidu-server/docker/openvidu-proxy/default_nginx_conf/global/ce/redirect_www.conf

@@ -1,5 +1,6 @@
 server {
     listen {http_port};
+    listen [::]:{http_port};
     server_name www.{domain_name};
     
     # Redirect to https

openvidu-server/docker/openvidu-proxy/default_nginx_conf/pro/default.conf

@@ -23,6 +23,7 @@ server {
     {redirect_www}
 
     listen {http_port} default_server;
+    listen [::]:{http_port} default_server;
     server_name {domain_name};
 
     # letsencrypt
@@ -48,6 +49,7 @@ server {
 
 server {
     listen {https_port} ssl default deferred;
+    listen [::]:{https_port} ssl default deferred;
     server_name {domain_name};
 
     {ssl_config}

openvidu-server/docker/openvidu-proxy/entrypoint.sh

@@ -254,9 +254,9 @@ sed -e '/{proxy_config}/{r default_nginx_conf/global/proxy_config.conf' -e 'd}'
 sed -i "s/{domain_name}/${DOMAIN_OR_PUBLIC_IP}/g" /etc/nginx/conf.d/*
 
 # IPv6 listening (RFC 6540)
-if [ -f /proc/net/if_inet6 ]; then
-  sed -i 's/ {http_port}/ [::]:{http_port}/g' /etc/nginx/conf.d/*
-  sed -i 's/ {https_port}/ [::]:{https_port}/g' /etc/nginx/conf.d/*
+if [ ! -f /proc/net/if_inet6 ]; then
+  sed -i '/ [::]:{http_port}/d' /etc/nginx/conf.d/*
+  sed -i '/ [::]:{https_port}/d' /etc/nginx/conf.d/*
 fi
 
 sed -i "s/{http_port}/${PROXY_HTTP_PORT}/g" /etc/nginx/conf.d/*