Use postgresql as database for Matrix bridges

configuration.nix

@@ -162,6 +162,16 @@ with pkgs;
       owner = "coolneng";
       group = "podman";
     };
+    secrets.facebook = {
+      file = secrets/facebook.age;
+      owner = "matrix-as-facebook";
+      group = "matrix-as-facebook";
+    };
+    secrets.signal = {
+      file = secrets/signal.age;
+      owner = "matrix-as-signal";
+      group = "matrix-as-signal";
+    };
     identityPaths = [ "/etc/ssh/id_ed25519" ];
   };