Added a working backend container

backend/Dockerfile

@@ -1,19 +1,11 @@
-# For more information, please refer to https://aka.ms/vscode-docker-python
-FROM python:3.9
+FROM python
 
-EXPOSE 5000
+WORKDIR /opt/
 
-# Keeps Python from generating .pyc files in the container
-ENV PYTHONDONTWRITEBYTECODE 1
+COPY requirements.txt .
 
-# Turns off buffering for easier container logging
-ENV PYTHONUNBUFFERED 1
+RUN pip install -r requirements.txt
 
-# Install pip requirements
-ADD requirements.txt .
-RUN python -m pip install -r requirements.txt
-                                                                                   
-WORKDIR /app
-ADD . /app
+COPY /src .
 
-CMD ["flask", "run"]
+CMD [ "python", "app.py" ]