diff --git a/Dockerfile b/Dockerfile
index 47a354c..a1bf1b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,4 +2,5 @@ FROM pagespeed/nginx-pagespeed
 COPY ./etc/nginx/nginx.conf /etc/nginx/nginx.conf
 #COPY ./etc/nginx/sites-available/nginx.vh.default.conf /etc/nginx/sites-available/default
 #COPY ./etc/nginx/sites-available/etica.ai.conf /etc/nginx/sites-available/default
-COPY ./etc/nginx/sites-available/inclusao.etica.ai.conf /etc/nginx/conf.d/inclusao.etica.ai.conf
\ No newline at end of file
+COPY ./etc/nginx/sites-available/inclusao.etica.ai.conf /etc/nginx/conf.d/inclusao.etica.ai.conf
+COPY ./etc/nginx/sites-available/rp4fb-subdomain.conf /etc/nginx/conf.d/rp4fb-subdomain.conf
\ No newline at end of file
diff --git a/README.md b/README.md
index 5a7476a..de663d4 100644
--- a/README.md
+++ b/README.md
@@ -7,4 +7,4 @@ content to [Free Basics by Facebook](https://info.internet.org).
 
 # Apache/incubator-pagespeed-ngx
 - <https://github.com/apache/incubator-pagespeed-ngx/tree/master/docker>
-- <https://www.modpagespeed.com/doc/configuration#virtual-hosts>
\ No newline at end of file
+- <https://www.modpagespeed.com/doc/configuration#virtual-hosts>
diff --git a/etc/nginx/nginx.conf b/etc/nginx/nginx.conf
index 5f1e4a5..010efb2 100644
--- a/etc/nginx/nginx.conf
+++ b/etc/nginx/nginx.conf
@@ -27,6 +27,19 @@ http {
 
     #gzip  on;
 
+
+    # NOTE If you use rp4fb-subdomain.conf and need resolve hostnames instead of
+    #      a hardcoded reverse proxy IP, maybe you will need the line
+    #      resolver 127.0.0.11 ipv6=off;
+    # 
+    # @see https://stackoverflow.com/questions/35744650/docker-network-nginx-resolver/37656784#37656784
+    resolver 127.0.0.11 ipv6=off;
+
+    pagespeed on;
+
+    # Needs to exist and be writable by nginx.  Use tmpfs for best performance.
+    pagespeed FileCachePath /var/cache/ngx_pagespeed;
+
     # Is possible to overide these defaults on your virtual hosts
     # @see https://www.modpagespeed.com/doc/configuration#virtual-hosts
     # pagespeed DisableFilters canonicalize_javascript_libraries, combine_javascript, defer_javascript, inline_javascript, insert_ga, lazyload_images, outline_javascript, rewrite_javascript;
diff --git a/etc/nginx/sites-available/inclusao.etica.ai.conf b/etc/nginx/sites-available/inclusao.etica.ai.conf
index 98aef67..433b882 100644
--- a/etc/nginx/sites-available/inclusao.etica.ai.conf
+++ b/etc/nginx/sites-available/inclusao.etica.ai.conf
@@ -1,6 +1,6 @@
 server {
     listen       80;
-    server_name  rp4fb.*;
+    server_name  rp4fb.inclusao.etica.ai;
 
     location / {
         access_log off;
@@ -13,11 +13,6 @@ server {
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
 
-    pagespeed on;
-
-    # Needs to exist and be writable by nginx.  Use tmpfs for best performance.
-    pagespeed FileCachePath /var/cache/ngx_pagespeed;
-
     # Ensure requests for pagespeed optimized resources go to the pagespeed handler
     # and no extraneous headers get set.
     location ~ "\.pagespeed\.([a-z]\.)?[a-z]{2}\.[^.]{10}\.[^.]+" {
diff --git a/etc/nginx/sites-available/rp4fb-subdomain.conf b/etc/nginx/sites-available/rp4fb-subdomain.conf
new file mode 100644
index 0000000..a9cf98e
--- /dev/null
+++ b/etc/nginx/sites-available/rp4fb-subdomain.conf
@@ -0,0 +1,23 @@
+server {
+    listen       80;
+    #server_name  rp4fb.*;
+    server_name   ~^(rp4fb\.)?(?<mydomain>.+)$;
+
+    location / {
+        access_log off;
+        proxy_pass http://$mydomain:80;
+        #proxy_pass http://inclusao.etica.ai:80;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header Host $mydomain;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    }
+
+    # Ensure requests for pagespeed optimized resources go to the pagespeed handler
+    # and no extraneous headers get set.
+    location ~ "\.pagespeed\.([a-z]\.)?[a-z]{2}\.[^.]{10}\.[^.]+" {
+      add_header "" "";
+    }
+    location ~ "^/pagespeed_static/" { }
+    location ~ "^/ngx_pagespeed_beacon$" { }
+
+}
\ No newline at end of file