Add initial dingserver config

hosts/dingserver/bot.nix

@@ -0,0 +1,39 @@
+{pkgs, ... }:
+
+{
+  services.mautrix-facebook = {
+    enable = true;
+
+    # file containing the appservice and telegram tokens
+    #environmentFile = /etc/secrets/mautrix-telegram.env;
+
+    # The appservice is pre-configured to use SQLite by default.
+    # It's also possible to use PostgreSQL.
+    settings = {
+      homeserver = {
+        address = "http://localhost:8008";
+        domain = "broccoli.town";
+      };
+      appservice = {
+        address = "https://localhost:29319";
+        bot_username = "messenger_bot";
+        database = "sqlite:///var/lib/mautrix/bot.db";
+        port = 29319;
+        as_token = "NwNtnSTUaIIxf8DIew1XMYyktrbckiMp8iwcXUGkHq28tYVc99A-IL2swBR7WFtl";
+        hs_token = "QAuD0k9I3QCfEfhlnWbqBFGOTJz-fFdesnzZOovJxdfGVMDCkdFEb6Zvu5eGAIZi";
+      };
+      bridge = {
+        encryption = {
+          allow = true;
+          default = true;
+        };
+        username_template = "facebook_{userid}";
+        permissions = {
+          "*" = "relay";
+          "broccoli.town"  = "user";
+          "@dung:broccoli.town" = "admin";
+        };
+      };
+    };
+  };
+}