Fix everything.

system/services/server/socialserver/mastodon/default.nix

@@ -0,0 +1,23 @@
+{ config, lib, pkgs, ... }:
+{
+  config = lib.mkIf config.system.socialserver.enable {
+    services.mastodon = {
+      enable = true;
+      localDomain = "social.nixfox.ca";
+      streamingProcesses = 4;
+      configureNginx = true;
+      smtp = {
+        createLocally = false;
+        host = "mx.nixfox.ca";
+        port = 587;
+        authenticate = true;
+        fromAddress = "NixFox Mastodon <noreply@nixfox.ca>";
+        user = "noreply@nixfox.ca";
+        passwordFile = pkgs.writeText "smtp_pass.txt" config.secrets.noreplyPassword;
+      };
+    };
+    environment.persistence."/persist".directories = [
+      "/var/lib/mastodon"
+    ];
+  };
+}