Introduction
In this article, a WEB application will be created using the latest version of Angular, a Docker image will be created and this image will be run in a Docker container.
Prerequisites
Before you start, you need to install and configure the tools below to create the Angular application and the Docker image.
- git: Git is a distributed version control system and it will be used to sync the repository.
- Node.js and npm: Node.js is a JavaScript code runtime software based on Google's V8 engine. npm is a package manager for Node.js (Node.js Package Manager). They will be used to build and run the Angular application and install the libraries.
- Angular CLI: Angular CLI is a command line utility tool for Angular and it will be used to create the base structure of the Angular application.
- Docker Engine: Docker Engine is a command line utility tool for Docker and it will be used to create and run containers.
- IDE (e.g. Visual Studio Code or WebStorm): IDE (Integrated Development Environment) is a tool with a graphical interface to help in the development of applications and it will be used to develop the Angular application.
Getting started
Create the Angular application
Angular is a development platform for building WEB, mobile and desktop applications using HTML, CSS and TypeScript (JavaScript). Currently, Angular is at version 17 and Google is the main maintainer of the project.
1. Let's create the application with the Angular base structure using the @angular/cli with the server-side rendering (SSR) disabled, the route file and the SCSS style format.
ng new angular-docker --ssr false --routing true --style scss
CREATE angular-docker/README.md (1067 bytes)
CREATE angular-docker/.editorconfig (274 bytes)
CREATE angular-docker/.gitignore (548 bytes)
CREATE angular-docker/angular.json (2806 bytes)
CREATE angular-docker/package.json (1045 bytes)
CREATE angular-docker/tsconfig.json (903 bytes)
CREATE angular-docker/tsconfig.app.json (263 bytes)
CREATE angular-docker/tsconfig.spec.json (273 bytes)
CREATE angular-docker/.vscode/extensions.json (130 bytes)
CREATE angular-docker/.vscode/launch.json (470 bytes)
CREATE angular-docker/.vscode/tasks.json (938 bytes)
CREATE angular-docker/src/main.ts (250 bytes)
CREATE angular-docker/src/favicon.ico (15086 bytes)
CREATE angular-docker/src/index.html (299 bytes)
CREATE angular-docker/src/styles.scss (80 bytes)
CREATE angular-docker/src/app/app.component.scss (0 bytes)
CREATE angular-docker/src/app/app.component.html (20884 bytes)
CREATE angular-docker/src/app/app.component.spec.ts (940 bytes)
CREATE angular-docker/src/app/app.component.ts (373 bytes)
CREATE angular-docker/src/app/app.config.ts (227 bytes)
CREATE angular-docker/src/app/app.routes.ts (77 bytes)
CREATE angular-docker/src/assets/.gitkeep (0 bytes)
✔ Packages installed successfully.
Successfully initialized git.
2. Now we will run the application with the command below.
npm start
> angular-docker@0.0.0 start
> ng serve
Initial Chunk Files | Names | Raw Size
polyfills.js | polyfills | 82.71 kB |
main.js | main | 23.23 kB |
styles.css | styles | 96 bytes |
| Initial Total | 106.03 kB
Application bundle generation complete. [1.504 seconds]
Watch mode enabled. Watching for file changes...
➜ Local: http://localhost:4200/
3. Ready! Next, we will access the URL http://localhost:4200/ and check if the application is working.
Create the Docker image
Docker: Docker is a software that allows developers to create and run container applications.
1. Let's create the Dockerfile file with the Docker image configuration in the root directory of the Angular application.
touch Dockerfile
2. Now we will configure the Dockerfile file with the content below.
FROM node:alpine
WORKDIR /usr/src/app
COPY . /usr/src/app
RUN npm install -g @angular/cli
RUN npm install
CMD ["ng", "serve", "--host", "0.0.0.0"]
Notes:
- The
FROM node:alpinesetting defines the base Docker image. - The
WORKDIR /usr/src/appsetting defines the default application directory. The defined directory is created if it does not exist. - The
COPY . /usr/src/appsetting copies the local application files and directories to the defined directory. - The
npm install -g @angular/clisetting installs the global command line dependency for Angular. - The
RUN npm installsetting installs the Angular application dependencies. - The
CMD ["ng", "serve", "--host", "0.0.0.0"]setting creates and runs the Angular application for external access.
3. Next, we will create the image with with the command below.
docker build -t angular-docker .
4. After create the image, we will check if the image was created with the command below.
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
angular-docker latest 73bfa0093a57 10 seconds ago 463MB
5. Ready! The Docker image with ID 73bfa0093a57 and 463MB was created.
Run the Docker container
1. Let's run the Docker container using the image created of the Angular application with the command below.
docker run -p 4201:4200 angular-docker
2. Now we will check if the container is running with the command below.
docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b9f106cbdcca angular-docker "docker-entrypoint.s…" 5 seconds ago Up 4 seconds 0.0.0.0:4201->4200/tcp, :::4201->4200/tcp eloquent_elgamal
3. Ready! Next, we will access the URL http://localhost:4201/ and check if the application is working inside the Docker container.
The application repository is available at https://github.com/rodrigokamada/angular-docker.
Conclusion
Summarizing what was covered in this article:
- We create an Angular application.
- We create a Docker image.
- We run a Docker container.
- We tested the Angular application inside the Docker container.
You can use this article to create a Docker container with an Angular application image.
Thank you for reading and I hope you enjoyed the article!
This tutorial was posted on my blog in portuguese.
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Top comments (9)
Thank you, this is a very nice Blog post. But it's important to note, that no one should not run Angular with "ng --serve" in production. It's strongly recommended to do a two stage Dockerfile with the first stage as you perfectly describe above, but the second stage consists of a minimal and secure static webserver (like nginx, caddy etc.) and copying only the build files to the second stage. This way the image will be much smaller, much faster and more secure.
You are right!
Will you fix it, or are you intending to hack unsuspecting script kiddies?
But does that utilize SSR?
no
Solution was not working for me then I add "EXPOSE 4200". then, it's working.
See that the exposed port is 4201.
Great Article
Thanks!