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Creating Images Using a Dockerfile

You’ve decided to Dockerize your weather-app. Before you can do this, you'll need to create an image for it. And you'll want to keep the image small, so you will create it using a multi-stage build. Using instructions in a Dockerfile, build the image, then test it by creating a container that uses it.

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Path Info

Clock icon Intermediate
Clock icon 1h 0m
Clock icon Apr 04, 2019

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Table of Contents

  1. Challenge

    Create a docker file

    Create a docker file:

    vi Dockerfile

    Dockerfile contents:

    FROM node AS source
    RUN mkdir -p /node/weather-app
    ADD src/ /node/weather-app
    WORKDIR /node/weather-app
    RUN npm install
    FROM node:alpine
    LABEL org.label-schema.version=$APP_VERSION
    ENV NODE_ENV="production"
    COPY --from=source /node/weather-app /node/weather-app
    WORKDIR /node/weather-app
    EXPOSE 3000
    ENTRYPOINT ["./bin/www"]
  2. Challenge

    Build the image

    Use Git commit hash as the image tag:

    cd src
    git log -1 --pretty=%H
    cd ../

    Build the image:

    sudo docker image build -t linuxacademy/weather-app:[HASH] --build-arg APP_VERSION=2.0 .
  3. Challenge

    Deploy a test container using the image just created

    Create the weather-app container:

    sudo docker container run -d --name weather-app -p 8080:3000 linuxacademy/weather-app:<HASH>

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