👷 Add dockerfile for CI

Dockerfile

@@ -0,0 +1,13 @@
+FROM python:3.9.1
+
+COPY . /app 
+WORKDIR /app
+
+ENV FLASK_APP=autoapp.py
+
+RUN pip install -r requirements.txt
+
+EXPOSE 8000
+
+CMD["flask", "db", "upgrade"]
+CMD["python", "autoapp.py"]