Let's first discuss the Dockerfile by walking through what it told Docker to do during the build process. The first line:
FROM python:3
This informs Docker that we want to build our container image based on the Python:3 image found on Docker Hub. This is a prebuilt Linux image with Python 3 installed. The next line informs Docker that we want all of our file operations to be relative to the /usr/src/app folder.
WORKDIR /usr/src/app
At this point in building the image we have a base Python 3 install in place. We need to then install the various libraries that our scraper uses, so the following tells Docker to run pip to install them:
RUN pip install nameko BeautifulSoup4 nltk lxml
We also need to install the NLTK data files:
