Initialize project with basic structure, including Docker configuration, backend and frontend setup, environment configuration, and essential files for development.

backend/migrations/003_player_preferences.sql

@@ -0,0 +1,9 @@
+-- +mixmaker Up
+ALTER TABLE players
+    ADD COLUMN IF NOT EXISTS preferred_roles jsonb NOT NULL DEFAULT '[]'::jsonb,
+    ADD COLUMN IF NOT EXISTS preferred_player_ids jsonb NOT NULL DEFAULT '[]'::jsonb;
+
+-- +mixmaker Down
+ALTER TABLE players
+    DROP COLUMN IF EXISTS preferred_player_ids,
+    DROP COLUMN IF EXISTS preferred_roles;