add entrypoint

Dockerfile

@@ -9,4 +9,10 @@ RUN pip install --upgrade pip
 COPY ./requirements.txt .
 RUN pip install -r requirements.txt
 
-COPY . .
+COPY ./entrypoint.sh .
+RUN sed -i 's/\r$//g' /usr/src/app/entrypoint.sh
+RUN chmod +x /usr/src/app/entrypoint.sh
+
+COPY . .
+
+ENTRYPOINT ["/usr/src/app/entrypoint.sh"]