Add host-build deploy path for slow Docker npm installs

Install and build on the server host with npmmirror, then package a slim image without network during docker build.

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.prebuilt.yml

@@ -0,0 +1,41 @@
+services:
+  postgres:
+    image: postgres:16-alpine
+    container_name: fabric_trade_db
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER:-fabric}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-fabric123}
+      POSTGRES_DB: ${POSTGRES_DB:-fabric_trade}
+    ports:
+      - '${POSTGRES_PORT:-5432}:5432'
+    volumes:
+      - fabric_pg_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ['CMD-SHELL', 'pg_isready -U $$POSTGRES_USER -d $$POSTGRES_DB']
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  api:
+    build:
+      context: .
+      dockerfile: Dockerfile.prebuilt
+    container_name: fabric_trade_api
+    restart: unless-stopped
+    depends_on:
+      postgres:
+        condition: service_healthy
+    environment:
+      DATABASE_URL: postgresql://${POSTGRES_USER:-fabric}:${POSTGRES_PASSWORD:-fabric123}@postgres:5432/${POSTGRES_DB:-fabric_trade}?schema=public
+      JWT_SECRET: ${JWT_SECRET:-fabric-trade-dev-secret-change-me}
+      JWT_EXPIRES_IN: ${JWT_EXPIRES_IN:-7d}
+      PORT: 3000
+      MOCK_OTP_CODE: ${MOCK_OTP_CODE:-123456}
+      OTP_TTL_MINUTES: ${OTP_TTL_MINUTES:-5}
+      RUN_SEED: ${RUN_SEED:-false}
+    ports:
+      - '127.0.0.1:${API_PORT:-3000}:3000'
+
+volumes:
+  fabric_pg_data: