Move to Docker; remove Logfire; small prompt fixes

Dockerfile

@@ -0,0 +1,37 @@
+# syntax=docker/dockerfile:1
+
+FROM ghcr.io/astral-sh/uv:python3.13-bookworm-slim AS builder
+
+ENV UV_COMPILE_BYTECODE=1 \
+    UV_LINK_MODE=copy \
+    UV_PROJECT_ENVIRONMENT=/app/.venv
+
+WORKDIR /app
+
+RUN --mount=type=cache,target=/root/.cache/uv \
+    --mount=type=bind,source=pyproject.toml,target=pyproject.toml \
+    --mount=type=bind,source=uv.lock,target=uv.lock \
+    uv sync --frozen --no-dev --no-install-project
+
+COPY . .
+RUN --mount=type=cache,target=/root/.cache/uv \
+    uv sync --frozen --no-dev
+
+FROM python:3.13-slim AS runtime
+
+RUN groupadd --system --gid 10001 app \
+    && useradd --system --uid 10001 --gid app app
+
+WORKDIR /app
+
+COPY --from=builder --chown=app:app /app /app
+
+ENV PATH="/app/.venv/bin:$PATH" \
+    PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONHASHSEED=random
+
+USER app
+
+ENTRYPOINT ["python"]
+CMD ["main.py"]