Update Dockerfile

Dockerfile

@@ -1,11 +1,20 @@
-FROM python:3.8
+FROM python:3.9
 
-WORKDIR /app
+WORKDIR /code
 
-COPY . /app
+COPY ./requirements.txt /code/requirements.txt
 
-RUN pip install -r requirements.txt
+RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
-EXPOSE 5000
+RUN useradd -m -u 1000 user
+
+USER user
+
+ENV HOME=/home/user \
+	PATH=/home/user/.local/bin:$PATH
+
+WORKDIR $HOME/app
+
+COPY --chown=user . $HOME/app
 
 CMD ["flask", "run", "--host", "0.0.0.0", "--port", "5000"]