fix: correct COPY path and add CMD in Dockerfile

- COPY ./app /app/app → /usr/src/app/app (matches WORKDIR)
- Add CMD for uvicorn startup (was missing, inheriting python3 no-op from base image)

Dockerfile

@@ -1 +1,12 @@
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+FROM python:3.11-slim-bookworm
+
+WORKDIR /usr/src/app
+
+COPY requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+RUN playwright install chromium
+RUN playwright install-deps chromium
+
+COPY ./app /usr/src/app/app
+
+CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "80"]