feat(infra): add Dockerfile for API container

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ImTotem

infra/docker/Dockerfile

@@ -0,0 +1,30 @@
+FROM python:3.12-slim AS deps
+
+WORKDIR /build
+COPY pyproject.toml .
+RUN mkdir -p src/bcsd_api && touch src/bcsd_api/__init__.py && \
+    pip install --no-cache-dir .
+
+FROM python:3.12-slim
+
+RUN groupadd -r app && useradd -r -g app app
+
+ENV TZ=Asia/Seoul
+
+WORKDIR /app
+
+COPY --from=deps /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
+COPY --from=deps /usr/local/bin /usr/local/bin
+
+COPY pyproject.toml .
+COPY src/ src/
+RUN pip install --no-cache-dir --no-deps .
+
+USER app
+
+EXPOSE 8000
+
+HEALTHCHECK --interval=30s --timeout=5s --retries=3 \
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:8000/openapi.json')"
+
+CMD ["uvicorn", "bcsd_api.main:app", "--host", "0.0.0.0", "--port", "8000"]