Pay close attention to the order of your Dockerfile commands to leverage layer caching
Docker best practice:
Order Dockerfile commands appropriately to better leverage caching.
Example:
# sample.py is copied before requirements.txt # dependencies will be installed for every change to sample.py FROM python:3.9-slim WORKDIR /app COPY sample.py . COPY requirements.txt . RUN pip install -r /requirements.txt # sample.py is copied after requirements.txt # dependencies will be installed only for changes to requirements.txt # when there are no changes, Docker cache will be used FROM python:3.9-slim WORKDIR /app COPY requirements.txt . RUN pip install -r /requirements.txt COPY sample.py .