Adds user to docker image and runs app

Dockerfile

@@ -3,13 +3,16 @@ FROM python:3.9
 RUN mkdir src
 RUN mkdir app
 
-WORKDIR /src/app
+RUN useradd -m -u 1000 user
+USER user
+ENV PATH="/home/user/.local/bin:$PATH"
 
-COPY ./requirements.txt ./
+WORKDIR /src/app
 
-RUN pip3 install --no-cache-dir -r requirements.txt
+COPY --chown=user ./requirements.txt ./
+RUN pip3 install --no-cache-dir --upgrade -r requirements.txt
 
-COPY . .
+COPY --chown=user . .
 
 EXPOSE 7860