Docker Beginner's Guide: From Installation to Deploying a Vue Application

The article begins with an analogy of building houses to illustrate how Docker images act like portable "mirrors" of applications, enabling rapid deployment and scaling without worrying about version or compatibility issues.

It then contrasts virtual machines, which emulate full hardware and consume more resources, with containers that virtualize the operating‑system layer, offering lightweight isolation, higher resource utilization, and faster startup.

Key Docker concepts are introduced: an Image is a read‑only template, a Container is a runtime instance of an image, and a Repository stores images. The article explains why Docker is fast and how it shares the host kernel.

Installation steps are provided for macOS using Homebrew Cask ( brew cask install docker) and for other platforms via the official Docker website. Configuration of registry mirrors and debugging options is also shown.

To create a Dockerized Vue app, the guide walks through creating a project with vue create docker-demo, building it, and preparing a Dockerfile that copies the dist folder into an nginx base image and adds a custom default.conf:

FROM nginx
COPY dist/ /usr/share/nginx/html/
COPY default.conf /etc/nginx/conf.d/default.conf

The docker build -t jartto-docker-demo . command builds the image, and

docker run -d -p 3000:80 --name docker-vue jartto-docker-demo

runs it, exposing the app on port 3000. Commands to list images, view running containers, and access the app via curl or a browser are included.

Publishing the image involves logging into Docker Hub, tagging the image, and pushing it with docker push. The article concludes with a list of Dockerfile instructions (FROM, MAINTAINER, RUN, COPY, CMD, ENTRYPOINT, LABEL, ENV, EXPOSE, VOLUME, WORKDIR, USER, ARG) and best‑practice recommendations such as specifying exact base images, minimizing layers, and documenting steps.

Overall, the guide emphasizes that containerization is a core skill for modern cloud environments and encourages further exploration of orchestration tools like Kubernetes, Service Mesh, and Istio.