Add nginx configuration for pub.solar website

hosts/nachtigall/apps/nginx-website.nix

@@ -0,0 +1,53 @@
+{ ... }:
+
+{
+  services.nginx.virtualHosts = {
+    "www.pub.solar".locations."/".extraConfig = "return 301 https://pub.solar$request_uri";
+
+    "pub.solar" = {
+      default = true;
+      enableACME = true;
+
+      locations = {
+# PubSolarOS images
+        "/os/download" = {
+          root = "/data/srv/www";
+          extraConfig = "autoindex on;";
+        };
+
+# serve base domain pub.solar for mastodon.pub.solar
+# https://masto.host/mastodon-usernames-different-from-the-domain-used-for-installation/
+        "/.well-known/host-meta" = {
+          extraConfig = ''
+            return 301 https://mastodon.pub.solar$request_uri;
+          '';
+        };
+
+# Tailscale OIDC webfinger requirement plus Mastodon webfinger redirect
+        "/.well-known/webfinger" = {
+# Redirect requests that match /.well-known/webfinger?resource=* to Mastodon
+          extraConfig = ''
+            if ($arg_resource) = {
+              return 301 https://mastodon.pub.solar$request_uri;
+            }
+
+            add_header Content-Type text/plain;
+            return 200 '{\n  "subject": "acct:admins@pub.solar",\n  "links": [\n    {\n    "rel": "http://openid.net/specs/connect/1.0/issuer",\n    "href": "https://auth.pub.solar/realms/pub.solar"\n    }\n  ]\n}';
+          '';
+        };
+
+        "/satzung" = {
+          extraConfig = ''
+            return 302 /satzung https://cloud.pub.solar/s/2tRCP9aZFCiWxQy;
+          '';
+        };
+
+        "/" = {
+          root = "/srv/www/pub.solar";
+          index = "index.html";
+          tryFiles = "$uri $uri/";
+        };
+      };
+    };
+  };
+}

hosts/nachtigall/default.nix

@@ -9,5 +9,7 @@
       ./networking.nix
       ./nix.nix
       ./apps/nginx.nix
+
+      ./apps/nginx-website.nix
     ];
 }