Add Docker Compose deployment

Full node_modules image (not output: standalone — its file-tracing drops
argon2's JS loader and segfaults in prod). drizzle.config.ts now honors
DATA_DIR like the sibling projects, so db:migrate targets the mounted
volume instead of an image-local path.

docker-compose.yml

@@ -0,0 +1,18 @@
+name: project-claude
+
+services:
+  app:
+    build: .
+    ports:
+      - "8180:8180"
+    env_file:
+      - .env
+    environment:
+      - PORT=8180
+      - DATA_DIR=/data
+    volumes:
+      - data:/data
+    restart: unless-stopped
+
+volumes:
+  data: