add proxy host for website

hosts/proxy/default.nix

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+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+{
+  imports = [
+    ./hardware-configuration.nix
+  ];
+
+  networking.hostName = "proxy";
+  networking.interfaces.ens18.ipv4.addresses = [
+    {
+      address = "141.56.51.1";
+      prefixLength = 24;
+    }
+  ];
+
+  networking.defaultGateway.address = "141.56.51.254";
+  networking.nameservers = [
+    "9.9.9.9"
+    "1.1.1.1"
+  ];
+  security.acme = {
+    certs."stura.htw-dresden.de" = {
+      listenHTTP = "127.0.0.1:8888";
+      postRun = ''
+        cat cert.pem key.pem > full.pem
+        chmod 640 full.pem
+        systemctl reload haproxy
+      '';
+    };
+  };
+
+# give haproxy access to the cert files
+users.users.haproxy.extraGroups = [ "acme" ];
+
+systemd.services.haproxy = {
+  after = [ "acme-finished-stura.htw-dresden.de.target" ];
+  wants = [ "acme-finished-stura.htw-dresden.de.target" ];
+};
+
+services = {
+    openssh.enable = true;
+    haproxy = {
+      enable = true;
+      config = ''
+        global
+          log /dev/log local0
+          maxconn 4096
+          # for ACME/Let's Encrypt cert + key in one file:
+          crt-base /var/lib/acme
+
+        defaults
+          log global
+          mode tcp
+          option tcplog
+          timeout connect 5s
+          timeout client  30s
+          timeout server  30s
+
+            # ---- HTTP (port 80) for ACME challenges ----
+        frontend http_in
+          bind *:80
+          mode http
+          option httplog
+
+          acl is_acme path_beg /.well-known/acme-challenge/
+          acl is_my_domain hdr(host) -i stura.htw-dresden.de
+          use_backend acme_backend if is_acme is_my_domain
+          # redirect everything else to HTTPS
+          redirect scheme https code 301 if !is_acme
+
+        backend acme_backend
+          mode http
+          server acme 127.0.0.1:8888 check
+
+
+        # ---- SNI routing (TCP, peek at handshake) ----
+        frontend sni_router
+          bind *:443
+          mode tcp
+          tcp-request inspect-delay 5s
+          tcp-request content accept if { req_ssl_hello_type 1 }
+
+          # terminated here
+          use_backend terminate_plone if { req_ssl_sni -i stura.htw-dresden.de }
+          # passed through to nginx on remote host
+          use_backend tls_passthrough if { req_ssl_sni -i pro.stura.htw-dresden.de }
+
+        backend terminate_plone
+          mode tcp
+          # loopback to the termination frontend below
+          server loopback 127.0.0.1:8443
+
+        backend tls_passthrough
+          mode tcp
+          server nginx_host 141.56.51.15:443 check
+
+        frontend https_terminated
+          bind 127.0.0.1:8443 ssl crt /var/lib/acme/stura.htw-dresden.de/full.pem
+          mode http
+
+          default_backend plone_backend
+
+        backend plone_backend
+          mode http
+          http-request set-header Host stura.htw-dresden.de
+          http-request replace-uri ^/(.*)$ /VirtualHostBase/https/stura.htw-dresden.de:443/Plone/VirtualHostRoot/\1
+          server plone 141.56.51.5:8080 check
+
+# proxy_pass "http://141.56.51.5:8080/VirtualHostBase/https/stura.htw-dresden.de:443/Plone/VirtualHostRoot/";
+      '';
+    };
+  };
+
+
+  networking.firewall.allowedTCPPorts = [
+    80
+    443
+  ];
+
+  system.stateVersion = "25.11";
+
+}

hosts/proxy/hardware-configuration.nix

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+# Do not modify this file!  It was generated by ‘nixos-generate-config’
+# and may be overwritten by future invocations.  Please make changes
+# to /etc/nixos/configuration.nix instead.
+{
+  config,
+  lib,
+  pkgs,
+  modulesPath,
+  ...
+}:
+
+{
+  imports = [
+    (modulesPath + "/profiles/qemu-guest.nix")
+  ];
+
+  boot.initrd.availableKernelModules = [
+    "ata_piix"
+    "uhci_hcd"
+    "virtio_pci"
+    "virtio_scsi"
+    "sd_mod"
+    "sr_mod"
+  ];
+  boot.initrd.kernelModules = [ ];
+  boot.kernelModules = [ ];
+  boot.extraModulePackages = [ ];
+
+  # fileSystems."/" =
+  #   {
+  #     device = "/dev/sda1";
+  #     fsType = "ext4";
+  #   };
+
+  # swapDevices = [ ];
+
+  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+}

hosts/proxy/hetzner-disk.nix

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+{
+  disko.devices = {
+    disk = {
+      main = {
+        type = "disk";
+        device = "/dev/sda";
+        content = {
+          type = "gpt";
+          partitions = {
+            boot = {
+              size = "1M";
+              type = "EF02"; # for grub MBR
+            };
+            ESP = {
+              priority = 1;
+              name = "ESP";
+              start = "1M";
+              end = "512M";
+              type = "EF00";
+              content = {
+                type = "filesystem";
+                format = "vfat";
+                mountpoint = "/boot";
+                mountOptions = [ "umask=0077" ];
+              };
+            };
+            root = {
+              size = "100%";
+              content = {
+                type = "btrfs";
+                extraArgs = [ "-f" ]; # Override existing partition
+                subvolumes = {
+                  "/rootfs" = {
+                    mountpoint = "/";
+                  };
+                  "/home" = {
+                    mountOptions = [ "compress=zstd" ];
+                    mountpoint = "/home";
+                  };
+                  # Sub(sub)volume doesn't need a mountpoint as its parent is mounted
+                  "/nix" = {
+                    mountOptions = [
+                      "compress=zstd"
+                      "noatime"
+                    ];
+                    mountpoint = "/nix";
+                  };
+                };
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}