♻️ consolidate nix configs

nix/modules/matrix/nginx.nix

@@ -0,0 +1,48 @@
+{ pkgs, ... }:
+
+{
+  services.nginx = {
+    enable = true;
+    virtualHosts = {
+      "matrix.walkah.chat" = {
+        forceSSL = true;
+        enableACME = true;
+        locations."/" = { proxyPass = "http://100.111.208.75:8008"; };
+      };
+
+      "syncv3.walkah.chat" = {
+        forceSSL = true;
+        enableACME = true;
+        locations."/" = { proxyPass = "http://100.111.208.75:8088"; };
+      };
+
+      "walkah.chat" = {
+        forceSSL = true;
+        enableACME = true;
+        locations = {
+          "= /.well-known/matrix/server".extraConfig =
+            let server = { "m.server" = "matrix.walkah.chat:443"; };
+            in
+            ''
+              default_type application/json;
+              add_header Access-Control-Allow-Origin *;
+              return 200 '${builtins.toJSON server}';
+            '';
+          "= /.well-known/matrix/client".extraConfig =
+            let
+              client = {
+                "m.homeserver" = { "base_url" = "https://matrix.walkah.chat"; };
+                "org.matrix.msc3575.proxy" = { "url" = "https://syncv3.walkah.chat"; };
+              };
+            in
+            ''
+              default_type application/json;
+              add_header Access-Control-Allow-Origin *;
+              return 200 '${builtins.toJSON client}';
+            '';
+          "/" = { root = pkgs.element-web; };
+        };
+      };
+    };
+  };
+}