docker support

APP_CORE/Dockerfile.gatherer

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+FROM python:3.12-alpine
+
+WORKDIR /app
+
+# Install dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy source code
+COPY . .
+
+# Run the gatherer
+CMD ["python", "openvpn_gatherer_v3.py"]