Split copy of files inside image to avoid useless reinstall of dependencies when only frontend app or main.py change

Author: kesonno

Dockerfile

@@ -7,9 +7,11 @@ RUN pip install virtualenv
 
 RUN apk add -U --no-cache git
 
-COPY . /app
+COPY ./requirements.txt /app/requirements.txt
 RUN virtualenv /env && /env/bin/pip install --no-cache-dir -r /app/requirements.txt
 
+COPY . /app
+
 VOLUME ["/opt/docker-compose-projects"]
 
 COPY demo-projects /opt/docker-compose-projects