diff --git a/README.install b/README.install
index e62cb86..2f43241 100644
--- a/README.install
+++ b/README.install
@@ -20,6 +20,10 @@ cryptpad_url=o13-pad.oopen.de
 #cryptpad_sandbox_url=cpadsb-01.oopen.de
 #cryptpad_sandbox_url=o13-padsb.oopen.de
 cryptpad_sandbox_url="$cryptpad_url"
+cryptpad_sandbox_url="cpadsb-01.oopen.de"
+cryptpad_sandbox_url="o13-padsb.oopen.de"
+
+vhost_config_file="${cryptpad_url}.conf"
 
 
 # ----------
@@ -33,6 +37,8 @@ apt-get install curl git-core
 # - Install Python
 # -
 apt-get install python-minimal python
+# debian bullseye:
+apt install python-is-python2 python2-minimal
 
 # - Install compiler stuff
 # -
@@ -58,8 +64,14 @@ openssl dhparam -out /etc/nginx/ssl/dhparam.pem 2048
 # - Create nginx configuration for CryptPad
 # -
 
-cat <<EOF > /etc/nginx/sites-available/${cryptpad_url}.conf
-# -- $cryptpad_url
+cat <<EOF > /etc/nginx/sites-available/${vhost_config_file}
+
+# we want restrict authentication to cryptpad sandbox urls "$cryptpad_sandbox_url"
+#
+#map \$http_host \$auth_type {
+#    default "off";               #This will turn off auth-basic
+#    $cryptpad_sandbox_url "Restricted";   #This or any other string will turn it back on
+#}
 
 server {
    listen 80;
@@ -83,7 +95,7 @@ server {
    # In the event of an XSS vulnerability in CryptPad's front-end code
    # this will limit the amount of information accessible to attackers.
    set \$main_domain "$cryptpad_url";
-   set \$sandbox_domain "$cryptpad_url";
+   set \$sandbox_domain "$cryptpad_sandbox_url";
 
    # CryptPad's dynamic content (websocket traffic and encrypted blobs)
    # can be served over separate domains. Using dedicated domains (or subdomains)
@@ -93,8 +105,21 @@ server {
    # If you do, they'll be added as exceptions to any rules which block connections to remote domains.
    set \$api_domain "$cryptpad_url";
    set \$files_domain "$cryptpad_url";
+EOF
+
+if [[ "$cryptpad_url" = "$cryptpad_sandbox_url" ]]; then
+   cat <<EOF >> /etc/nginx/sites-available/${vhost_config_file}
+
+   server_name $cryptpad_url;
+EOF
+else
+   cat <<EOF >> /etc/nginx/sites-available/${vhost_config_file}
 
    server_name $cryptpad_url $cryptpad_sandbox_url;
+EOF
+fi
+
+cat <<EOF >> /etc/nginx/sites-available/${vhost_config_file}
 
    ssl_certificate /var/lib/dehydrated/certs/$cryptpad_url/fullchain.pem;
    ssl_certificate_key /var/lib/dehydrated/certs/$cryptpad_url/privkey.pem;
@@ -119,7 +144,7 @@ server {
    # You'll need nginx 1.13.0 or better to support TLSv1.3
    ssl_protocols TLSv1.2 TLSv1.3;
 
-   ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
+   ssl_ciphers EECDH+AESGCM:EDH+AESGCM;
 
    ssl_ecdh_curve secp384r1; # Requires nginx >= 1.1.0
 
@@ -154,9 +179,16 @@ server {
    #}
    # End Bad Bot Blocker Includes
 
-   set \$coop '';
-   if (\$uri ~ ^\/sheet\/.*\$) { set \$coop 'same-origin'; }
+   # Opt out of Google's FLoC Network
+   add_header Permissions-Policy interest-cohort=();
+EOF
 
+cat <<EOF >> /etc/nginx/sites-available/${vhost_config_file}
+
+   set \$coop '';
+   #if (\$uri ~ ^\/(sheet|presentation|doc|convert)\/.*\$) { set \$coop 'same-origin'; }
+
+   # Enable SharedArrayBuffer in Firefox (for .xlsx export)
    add_header Cross-Origin-Resource-Policy cross-origin;
    add_header Cross-Origin-Opener-Policy \$coop;
    add_header Cross-Origin-Embedder-Policy require-corp;
@@ -176,12 +208,11 @@ server {
    # Will not set any header if it is emptystring
    add_header Cache-Control \$cacheControl;
 
-
    # CSS can be dynamically set inline, loaded from the same domain, or from \$main_domain
    set \$styleSrc   "'unsafe-inline' 'self' \${main_domain}";
 
    # connect-src restricts URLs which can be loaded using script interfaces
-   set \$connectSrc "'self' https://\${main_domain} \${main_domain} https://\${api_domain} blob: wss://\${api_domain} \${api_domain} \${files_domain}";
+   set \$connectSrc "'self' https://\${main_domain} \${main_domain} https://\${api_domain} blob: wss://\${api_domain} \${api_domain} \${files_domain} https://\${sandbox_domain}";
 
    # fonts can be loaded from data-URLs or the main domain
    set \$fontSrc    "'self' data: \${main_domain}";
@@ -210,11 +241,19 @@ server {
    set \$unsafe 0;
    # the following assets are loaded via the sandbox domain
    # they unfortunately still require exceptions to the sandboxing to work correctly.
-   if (\$uri = "/sheet/inner.html") { set \$unsafe 1; }
-   if (\$uri ~ ^\/common\/onlyoffice\/.*\/index\.html.*\$) { set \$unsafe 1; }
+   if (\$uri ~ ^\/(sheet|doc|presentation)\/inner.html.*\$) { set \$unsafe 1; }
+   if (\$uri ~ ^\/common\/onlyoffice\/.*\/.*\.html.*\$) { set \$unsafe 1; }
 
    # everything except the sandbox domain is a privileged scope, as they might be used to handle keys
    if (\$host != \$sandbox_domain) { set \$unsafe 0; }
+   # this iframe is an exception. Office file formats are converted outside of the sandboxed scope
+   # because of bugs in Chromium-based browsers that incorrectly ignore headers that are supposed to enable
+   # the use of some modern APIs that we require when javascript is run in a cross-origin context.
+   # We've applied other sandboxing techniques to mitigate the risk of running WebAssembly in this privileged scope
+   if (\$uri ~ ^\/unsafeiframe\/inner\.html.*\$) { set \$unsafe 1; }
+EOF
+
+cat <<EOF >> /etc/nginx/sites-available/${vhost_config_file}
 
    # privileged contexts allow a few more rights than unprivileged contexts, though limits are still applied
    if (\$unsafe) {
@@ -253,11 +292,18 @@ server {
    # /api/config is loaded once per page load and is used to retrieve
    # the caching variable which is applied to every other resource
    # which is loaded during that session.
-   location = /api/config {
+   location ~ ^/api/(config|broadcast).*\$ {
       proxy_pass http://localhost:3000;
       proxy_set_header X-Real-IP \$remote_addr;
       proxy_set_header Host \$host;
       proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
+
+   # These settings prevent both NGINX and the API server
+   # from setting the same headers and creating duplicates
+      proxy_hide_header Cross-Origin-Resource-Policy;
+      add_header Cross-Origin-Resource-Policy cross-origin;
+      proxy_hide_header Cross-Origin-Embedder-Policy;
+      add_header Cross-Origin-Embedder-Policy require-corp;
    }
 
    # encrypted blobs are immutable and are thus cached for a year
@@ -278,6 +324,9 @@ server {
       add_header 'Access-Control-Expose-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range,Content-Length';
       try_files \$uri =404;
    }
+EOF
+
+cat <<EOF >> /etc/nginx/sites-available/${vhost_config_file}
 
    # the "block-store" serves encrypted payloads containing users' drive keys
    # these payloads are unlocked via login credentials. They are mutable
@@ -291,15 +340,15 @@ server {
    # otherwise only served via websocket. This is solely for debugging purposes,
    # and is thus not allowed by default.
    #location ^~ /datastore/ {
-       #add_header Cache-Control max-age=0;
-       #try_files \$uri =404;
+      #add_header Cache-Control max-age=0;
+      #try_files \$uri =404;
    #}
 
    # The nodejs server has some built-in forwarding rules to prevent
    # URLs like /pad from resulting in a 404. This simply adds a trailing slash
    # to a variety of applications.
-   location ~ ^/(register|login|settings|user|pad|drive|poll|slide|code|whiteboard|file|media|profile|contacts|todo|filepicker|debug|kanban|sheet|support|admin|notifications|teams)\$ {
-       rewrite ^(.*)\$ \$1/ redirect;
+   location ~ ^/(register|login|settings|user|pad|drive|poll|slide|code|whiteboard|file|media|profile|contacts|todo|filepicker|debug|kanban|sheet|support|admin|notifications|teams|calendar|presentation|doc|form|report|convert)\$ {
+      rewrite ^(.*)\$ \$1/ redirect;
    }
 
    # Finally, serve anything the above exceptions don't govern.
@@ -307,8 +356,8 @@ server {
 
    # Only authenticated users
    #
-   auth_basic "Restricted Content";
-   auth_basic_user_file /etc/nginx/.htpasswd-${cryptpad_url%%.*};
+   #auth_basic "\$auth_type";
+   #auth_basic_user_file /etc/nginx/.htpasswd-${cryptpad_url%%.*};
 }
 EOF
 
@@ -410,8 +459,8 @@ chown -R www-data:www-data /var/www/{.cache,.config,.local,.node-gyp,.npm,.priva
 # ---
 
 cd /var/www/
-mkdir cryptpad
-chown www-data:www-data cryptpad
+chown www-data:www-data /var/www
+
 
 # - Get cryptpad
 # -
@@ -447,9 +496,13 @@ cp -a config/config.example.js config/config.js
 # -    ...
 # -    myDomain: oopen.de,
 # -
-perl -i -n -p -e"s#(\s*)(adminEmail:.*)#\1// \2\n\1adminEmail: 'admin\@oopen.de',#" /var/www/cryptpad/config/config.js
+if $(grep -q -E "\s*/?/?\s*adminEmail" /var/www/cryptpad/config/config.js 2> /dev/null) ; then
+   perl -i -n -p -e"s#(\s*)(adminEmail:.*)#\1// \2\n\1adminEmail: 'admin\@oopen.de',#" /var/www/cryptpad/config/config.js
+else
+   perl -i -n -p -e"s/(\s*})/    adminEmail: 'admin\@oopen.de',\n\1/" /var/www/cryptpad/config/config.js
+fi
 
-perl -i -n -p -e"s#(\s*)(httpUnsafeOrigin:.*)#\1// \2\n\1httpUnsafeOrigin: 'http://localhost:3000',#" /var/www/cryptpad//config/config.js
+perl -i -n -p -e"s#(\s*)(httpUnsafeOrigin:.*)#\1// \2\n\1httpUnsafeOrigin: 'https://${cryptpad_url}',#" /var/www/cryptpad/config/config.js
 
 perl -i -n -p -e"s#(\s*)(/*\s*)(httpSafeOrigin:.*)#\1// \3\n\1httpSafeOrigin: 'https://${cryptpad_sandbox_url}',#" /var/www/cryptpad/config/config.js
 
@@ -458,7 +511,11 @@ perl -i -n -p -e"s#(\s*)(/*\s*)(httpAddress:.*)#\1// \3\n\1httpAddress: '::',#"
 
 # - deaktivate donate Button
 # -
-perl -i -n -p -e"s#(\s*)(/*\s*)(removeDonateButton:.*)#\1//\3\n\1removeDonateButton: true,#" /var/www/cryptpad/config/config.js
+if $(grep -q -E "\s*/?/?\s*removeDonateButton" /var/www/cryptpad/config/config.js 2> /dev/null) ; then
+   perl -i -n -p -e"s#(\s*)(/*\s*)(removeDonateButton:.*)#\1//\3\n\1removeDonateButton: true,#" /var/www/cryptpad/config/config.js
+else
+   perl -i -n -p -e"s/(\s*})/    removeDonateButton: true,\n\1/" /var/www/cryptpad/config/config.js
+fi
 
 # - Set storage..
 # -
@@ -482,8 +539,9 @@ cp -a /var/www/cryptpad/customize.dist /var/www/cryptpad/customize
 
 # - Copy 'favicon.ico' to '/var/www/cryptpad/customize/main-favicon.png'
 # -
-#cp ~chris/favicon.ico /var/www/cryptpad/customize/main-favicon.png
+cp ~chris/favicon.ico /var/www/cryptpad/customize/main-favicon.png
 cp ~chris/favicon.ico /var/www/cryptpad/customize.dist/
+chown www-data:www-data /var/www/cryptpad/customize/main-favicon.png
 chown www-data:www-data /var/www/cryptpad/customize.dist/favicon.ico
 
 
@@ -537,3 +595,12 @@ systemctl enable cryptpad
 # -
 systemctl start cryptpad
 
+
+# ---
+# Basic Check of your configuration:
+# ---
+
+# In yout browser type:
+#
+#    https://${cryptpad_url}/checkup/
+