Standardise Dockerfile for local dev

Dockerfile

@@ -1,12 +1,23 @@
 FROM python:3.10-bullseye
 
 WORKDIR /app
-COPY requirements-dev.txt requirements-dev.txt
-RUN pip --no-cache-dir install --ignore-installed distlib -r requirements-dev.txt
-RUN pip install gunicorn
-RUN pip install uvicorn
-RUN apt-get update && apt-get install -y postgresql-client
+
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /uvx /bin/
+
+# Install the project's dependencies using the lockfile and settings
+RUN --mount=type=cache,target=/root/.cache/uv \
+    --mount=type=bind,source=uv.lock,target=uv.lock \
+    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
+    uv sync --frozen --no-install-project
+
+# Then, add the rest of the project source code and install it
+# Installing separately from its dependencies allows optimal layer caching
 COPY . .
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv sync --frozen
 
+# Place executables in the environment at the front of the path
+ENV PATH="/app/.venv/bin:$PATH"
 EXPOSE 8080
+
 CMD ["gunicorn", "--worker-class", "uvicorn.workers.UvicornWorker", "wsgi:app", "-b", "0.0.0.0:8080"]