♻️ consolidate nix configs

nix/modules/matrix/default.nix

@@ -0,0 +1,67 @@
+{ config, pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    matrix-synapse-tools.synadm
+  ];
+
+  services = {
+    postgresql = {
+      enable = true;
+      initialScript = pkgs.writeText "synapse-init.sql" ''
+        CREATE ROLE "matrix-synapse";
+        CREATE DATABASE "matrix" WITH OWNER "matrix-synapse"
+            TEMPLATE template0
+            ENCODING 'UTF8'
+            LC_COLLATE = "C"
+            LC_CTYPE = "C";
+      '';
+    };
+    postgresqlBackup.databases = [ "matrix" "matrix-syncv3" ];
+
+    matrix-synapse = {
+      enable = true;
+      settings = {
+        server_name = "walkah.chat";
+        public_baseurl = "https://matrix.walkah.chat";
+        enable_metrics = true;
+        enable_registration = false;
+        database = {
+          name = "psycopg2";
+          args = { database = "matrix"; };
+        };
+        listeners = [{
+          bind_addresses = [
+            "0.0.0.0"
+          ];
+          port = 8008;
+          type = "http";
+          tls = false;
+          x_forwarded = true;
+          resources = [{
+            compress = false;
+            names = [ "client" "federation" ];
+          }];
+        }];
+      };
+      extraConfigFiles = [
+        config.sops.secrets.matrix-registration-secret.path
+      ];
+    };
+
+    matrix-sliding-sync = {
+      enable = true;
+      settings = {
+        SYNCV3_SERVER = "https://matrix.walkah.chat";
+        SYNCV3_BINDADDR = "0.0.0.0:8088";
+      };
+      environmentFile = config.sops.secrets.matrix-sliding-sync-secret.path;
+    };
+  };
+
+  sops.secrets.matrix-registration-secret = {
+    owner = "matrix-synapse";
+  };
+
+  sops.secrets.matrix-sliding-sync-secret = { };
+}