diff --git a/docs/example.nginx.conf b/docs/example.nginx.conf
index a54687560..462b205fd 100644
--- a/docs/example.nginx.conf
+++ b/docs/example.nginx.conf
@@ -6,7 +6,16 @@
 
 server {
     listen 443 ssl http2;
-    server_name your-main-domain.com your-sandbox-domain.com;
+
+    # XXX These two variables 
+    set $main_domain "your-main-domain.com";
+    set $sandbox_domain "your-sandbox-domain.com";
+
+    # The $api_domain and $files_domain are optional
+    set $api_domain "api.your-main-domain.com";
+    set $files_domain "files.your-main-domain.com";
+
+    server_name $main_domain $sandbox_domain;
 
     ssl_certificate         /home/cryptpad/.acme.sh/your-main-domain.com/fullchain.cer;
     ssl_certificate_key     /home/cryptpad/.acme.sh/your-main-domain.com/your-main-domain.com.key;
@@ -24,6 +33,7 @@ server {
     add_header X-Content-Type-Options nosniff;
     # add_header X-Frame-Options "SAMEORIGIN";
 
+    # Insert the path to your CryptPad repository root here
     root /home/cryptpad/cryptpad;
     index index.html;
     error_page 404 /customize.dist/404.html;
@@ -34,15 +44,15 @@ server {
     # Will not set any header if it is emptystring
     add_header Cache-Control $cacheControl;
 
-    set $styleSrc	"'unsafe-inline' 'self' your-main-domain.com";
-	set $scriptSrc	"'self' your-main-domain.com";
-	set $connectSrc	"'self' https://your-main-domain.com wss://your-main-domain.com your-main-domain.com https://api.your-main-domain.com blob: your-main-domain.com";
-	set $fontSrc	"'self' data: your-main-domain.com";
-	set $imgSrc	    "'self' data: * blob: your-main-domain.com";
-	set $frameSrc	"'self' your-sandbox-domain.com blob: your-sandbox-domain.com";
-	set $mediaSrc	"'self' data: * blob: your-main-domain.com";
-	set $childSrc	"https://your-main-domain.com";
-	set $workerSrc	"https://your-main-domain.com";
+    set $styleSrc   "'unsafe-inline' 'self' ${main_domain}";
+    set $scriptSrc  "'self' ${main_domain}";
+    set $connectSrc "'self' https://${main_domain} wss://${main_domain} $main_domain https://${api_domain} blob:";
+    set $fontSrc    "'self' data: ${main_domain}";
+    set $imgSrc     "'self' data: * blob: ${main_domain}";
+    set $frameSrc   "'self' ${sandbox_domain} blob:";
+    set $mediaSrc   "'self' data: * blob: ${main_domain}";
+    set $childSrc   "https://${main_domain}";
+    set $workerSrc  "https://${main_domain}";
 
     set $unsafe 0;
     if ($uri = "/pad/inner.html") { set $unsafe 1; }
@@ -50,7 +60,7 @@ server {
     if ($uri = "/common/onlyoffice/web-apps/apps/spreadsheeteditor/main/index.html") { set $unsafe 1; }
     if ($host != sandbox.cryptpad.info) { set $unsafe 0; }
     if ($unsafe) {
-        set $scriptSrc "'self' 'unsafe-eval' 'unsafe-inline' new2.cryptpad.fr cryptpad.fr";
+        set $scriptSrc "'self' 'unsafe-eval' 'unsafe-inline' ${main_domain}";
     }
     add_header Content-Security-Policy "default-src 'none'; child-src $childSrc; worker-src $workerSrc; media-src $mediaSrc; style-src $styleSrc; script-src $scriptSrc; connect-src $connectSrc; font-src $fontSrc; img-src $imgSrc; frame-src $frameSrc;";