Simplify NixOS docs (#5120)

Author: SuperSandro2000

docs/docs/30-administration/05-installation/30-packages.md

@@ -115,21 +115,18 @@ in
   # This automatically sets up certificates via let's encrypt
   security.acme.defaults.email = "[email protected]";
   security.acme.acceptTerms = true;
-  security.acme.certs."${domain}" = { };
 
   # Setting up a nginx proxy that handles tls for us
-  networking.firewall.allowedTCPPorts = [ 80 443 ];
   services.nginx = {
     enable = true;
+    openFirewall = true;
     recommendedTlsSettings = true;
     recommendedOptimisation = true;
     recommendedProxySettings = true;
     virtualHosts."${domain}" = {
       enableACME = true;
       forceSSL = true;
-      locations."/" = {
-        proxyPass = "http://localhost:3007";
-      };
+      locations."/".proxyPass = "http://localhost:3007";
     };
   };
 

docs/versioned_docs/version-3.5/30-administration/05-installation/30-packages.md

@@ -115,21 +115,18 @@ in
   # This automatically sets up certificates via let's encrypt
   security.acme.defaults.email = "[email protected]";
   security.acme.acceptTerms = true;
-  security.acme.certs."${domain}" = { };
 
   # Setting up a nginx proxy that handles tls for us
-  networking.firewall.allowedTCPPorts = [ 80 443 ];
   services.nginx = {
     enable = true;
+    openFirewall = true;
     recommendedTlsSettings = true;
     recommendedOptimisation = true;
     recommendedProxySettings = true;
     virtualHosts."${domain}" = {
       enableACME = true;
       forceSSL = true;
-      locations."/" = {
-        proxyPass = "http://localhost:3007";
-      };
+      locations."/".proxyPass = "http://localhost:3007";
     };
   };