feat: add Docker and Railway deployment config

Dockerfile

@@ -0,0 +1,25 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Copiar requirements
+COPY server/requirements.txt .
+
+# Instalar dependencias
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copiar app
+COPY server/app ./app
+
+# Copiar config
+COPY server/.env.example ./app/.env
+
+# Exponer puerto
+EXPOSE 8000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+  CMD python -c "import requests; requests.get('http://localhost:8000/health')"
+
+# Correr app
+CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]