public-web-static: add configuration for www.didays.de redirect

config/hosts/public-web-static/virtualHosts/didays.de.nix

@@ -5,10 +5,15 @@ let
   dataDir = "/var/www/${domain}";
   deployUser = "didays-deploy";
 in {
+  security.acme.certs."${domain}".extraDomainNames = [ "www.${domain}" ];
+
   services.nginx.virtualHosts = {
     "acme-${domain}" = {
       enableACME = true;
       serverName = "${domain}";
+      serverAliases = [
+        "www.${domain}"
+      ];
 
       listen = [
         {
@@ -22,6 +27,41 @@ in {
       ];
     };
 
+    "www.${domain}" = {
+      forceSSL = true;
+      useACMEHost = "${domain}";
+
+      listen = [
+        {
+          addr = "[::]";
+          port = 8443;
+          ssl = true;
+          proxyProtocol = true;
+        }
+        {
+          addr = "0.0.0.0";
+          port = 8443;
+          ssl = true;
+          proxyProtocol = true;
+        }
+      ];
+
+      locations."/" = {
+        return = "302 https://didays.de$request_uri";
+      };
+
+      extraConfig = ''
+        # Make use of the ngx_http_realip_module to set the $remote_addr and
+        # $remote_port to the client address and client port, when using proxy
+        # protocol.
+        # First set our proxy protocol proxy as trusted.
+        set_real_ip_from 172.31.17.140;
+        # Then tell the realip_module to get the addreses from the proxy protocol
+        # header.
+        real_ip_header proxy_protocol;
+      '';
+    };
+
     "${domain}" = {
       forceSSL = true;
       useACMEHost = "${domain}";