feat: implementacao inicial do sistema LeadRadar

backend/Dockerfile

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+# Multi-stage Dockerfile for LeadRadar Backend API
+FROM python:3.11-slim
+
+# Evitar geração de arquivos .pyc e buffer de stdout
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
+
+WORKDIR /app
+
+# Instalar dependências do sistema
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    libpq-dev \
+    curl \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copiar requirements e instalar dependências Python
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Instalar navegador Chromium e suas dependências do sistema para o Playwright
+RUN playwright install --with-deps chromium
+
+# Copiar o restante do código do backend
+COPY . .
+
+EXPOSE 5000
+
+CMD ["python", "-m", "flask", "--app", "app:create_app", "run", "--host=0.0.0.0", "--port=5000"]