Refactor Dockerfile to use Python image from Astral instead of Python and remove unnecessary git installation

Dockerfile

@@ -1,9 +1,6 @@
-# Install uv
-FROM python:3.13-slim
-COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
-
-# Install git
-RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
+# syntax=docker/dockerfile:1
+# check=error=true
+FROM ghcr.io/astral-sh/uv:python3.13-bookworm-slim@sha256:73c021c3fe7264924877039e8a449ad3bb380ec89214282301affa9b2f863c5d
 
 # Change the working directory to the `app` directory
 WORKDIR /app
@@ -13,9 +10,6 @@ RUN --mount=type=cache,target=/root/.cache/uv \
     --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
     uv sync --no-install-project
 
-# Uninstall git to reduce image size
-RUN apt-get purge -y --auto-remove git
-
 # Copy the application files
 ADD main.py misc.py settings.py /app/