diff --git a/server/config.json5 b/server/config.json5
index 369d6ef..f8b9e0b 100644
--- a/server/config.json5
+++ b/server/config.json5
@@ -83,9 +83,23 @@
     audienceMode: false,
     decks: [
       // {
+      //   // A built-in deck.
       //   source: "BuiltIn",
+      //   // The id (filename without `.deck.json5`.
       //   id: "cah-base-en",
       // },
+      // {
+      //   // A deck from JSON Against Humanity
+      //   source: "JAH",
+      //   // The id can be found in the JSON as the key for the deck.
+      //   id: "Base",
+      // },
+      // {
+      //   // A deck from Many Decks
+      //   source: "ManyDecks",
+      //   // The deck code, as given on Many Decks.
+      //   deckCode: "ABCDE",
+      // },
     ],
   },
 
diff --git a/server/src/ts/lobby.ts b/server/src/ts/lobby.ts
index c45c8f1..5c9c59c 100644
--- a/server/src/ts/lobby.ts
+++ b/server/src/ts/lobby.ts
@@ -92,7 +92,9 @@ export const fromDefaults = (
       rules: Rules.fromDefaults(defaults.rules),
       public: defaults.public,
       audienceMode: defaults.audienceMode,
-      decks: [],
+      decks: defaults.decks.map((d) => ({
+        source: d,
+      })),
     },
     tasks: tasks,
   };