feat: consolidate backend and docker-compose setup

backend/scripts/install.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+cd "$ROOT"
+
+# Avoid picking up another project's active venv
+unset VIRTUAL_ENV
+
+PYTHON="${PYTHON:-3.12}"
+FLASH_ATTN_WHEEL="${FLASH_ATTN_WHEEL:-}"
+
+echo "==> Using uv with Python ${PYTHON}"
+uv python pin "${PYTHON}"
+uv sync
+
+if [[ -n "${FLASH_ATTN_WHEEL}" ]]; then
+  echo "==> Installing prebuilt flash-attn wheel"
+  uv pip install --python .venv "${FLASH_ATTN_WHEEL}"
+else
+  echo "==> Installing flash-attn (may require a prebuilt wheel; set FLASH_ATTN_WHEEL)"
+  uv pip install --python .venv "flash-attn==2.8.2"
+fi
+
+echo "==> Verifying paddleocr genai_server entrypoint"
+uv run paddleocr genai_server --help >/dev/null
+
+echo "==> Done. Start the service with: ./scripts/serve.sh"