add docker setup

docker/Dockerfile

@@ -0,0 +1,36 @@
+FROM python:3.14-slim AS builder
+
+ENV POETRY_NO_INTERACTION=1 \
+    POETRY_VIRTUALENVS_IN_PROJECT=true
+
+RUN pip install --upgrade pip
+RUN pip install poetry
+
+WORKDIR /app
+
+COPY poetry.lock pyproject.toml ./
+
+RUN poetry install --only main --no-root
+
+
+FROM python:3.14-slim AS runtime
+
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1
+
+RUN adduser --disabled-password --gecos "" appuser
+
+WORKDIR /app
+
+COPY --from=builder /app/.venv /app/.venv
+COPY --from=builder /app/pyproject.toml /app/poetry.lock ./
+COPY . /app
+
+RUN mkdir -p /data && chown appuser:appuser /data
+
+ENV PATH="/app/.venv/bin:$PATH"
+
+USER appuser
+
+EXPOSE 8000
+CMD ["uvicorn", "fdhview.main:app", "--host", "0.0.0.0", "--port", "8000"]