Added docker-files

Dockerfile

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+# syntax=docker/dockerfile:1
+
+FROM python:3.8-slim-buster
+
+WORKDIR /app
+
+COPY requirements.txt requirements.txt
+RUN pip3 install -r requirements.txt
+
+COPY . .
+
+CMD [ "bash", "-c", "./entry.sh" ]

entry.sh

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+#!/bin/bash
+
+# Create data-dir if not exists
+mkdir -p /data
+
+# TryCopy configs to data-dir
+cp -n data/* /data/
+
+# Execute daemon
+python3 daemon.py

requirements.txt

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+pyyaml
+py3dns