chore: improve docker caching

Dockerfile

@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1
+
 FROM docker.io/python:3.12-slim-bookworm AS python-base-stage
 
 ENV \
@@ -20,8 +22,8 @@ ENV \
 
 RUN --mount=from=ghcr.io/astral-sh/uv,source=/uv,target=/bin/uv \
   --mount=type=cache,target=/root/.cache/uv,sharing=locked \
-  --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
-  --mount=type=bind,source=uv.lock,target=uv.lock \
+  --mount=source=pyproject.toml,target=pyproject.toml \
+  --mount=source=uv.lock,target=uv.lock \
   uv sync --extra non-termux --no-dev --no-install-project --frozen
 
 
@@ -36,7 +38,7 @@ RUN apt-get update \
   && mkdir -p /home/app/.cache/proxy_scraper_checker \
   && chown app:app /home/app/.cache/proxy_scraper_checker
 
-COPY --chown=app:app --from=python-build-stage /app/.venv /app/.venv
+COPY --from=python-build-stage --chown=app:app --link /app/.venv /app/.venv
 
 ENV PATH="/app/.venv/bin:$PATH"