卫戍协议：盟约 web remake — initial import

Online co-op browser remake of Arknights' Stronghold Protocol: Alliance
(client-simulated combat, official waves/bonds/items/strategies, 3D board,
facing wheel, operator loadout, official emotes, deployment scripts).

.dockerignore

@@ -0,0 +1,21 @@
+# Keep the build context small and free of machine-specific state (see Dockerfile).
+.git
+.github
+.claude
+node_modules
+.cache
+.venv*
+**/__pycache__
+test
+logs
+*.log
+docs/img
+# game art is mounted at runtime or downloaded with --build-arg FETCH_ASSETS=1, never sent from the host
+public/assets
+# generated from node_modules inside the image
+public/vendor
+scripts/service.env.cmd
+.DS_Store
+Thumbs.db
+.env
+.env.*