added dockerfile

src/Python/flask/.dockerignore

@@ -0,0 +1 @@
+__pycache__

src/Python/flask/Dockerfile

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+FROM python:3.9
+
+WORKDIR /app
+
+COPY . .
+
+RUN apt-get update && apt-get install -y libgl1
+
+
+RUN pip install -r requirements.txt
+
+EXPOSE 5000
+
+CMD ["python", "web/app.py"]
+
+#build instruction: sudo docker buildx build -t flaskapp:latest .   
+#run instruction: sudo docker run --network="host" flaskapp:latest
+# need to use network host to connect to the host machine's localhost to connect to mqtt server

src/Python/flask/requirements.txt

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+Flask==3.1.0
+paho-mqtt==1.6.1
+ultralytics==8.3.58
+opencv-python-headless==4.6.0.66
+numpy==1.23.4