Creating .dockerignore and Running the Node.js Application with Docker Compose

# database that your application can use. `depends_on` tells Docker Compose to # start the database before your application. The `db-data` volume persists the # database data between container restarts. The `db-password` secret is used # to set the database password. You must create `db/password.txt` and add # a password of your choosing to it before running `docker compose up`. # depends_on: # db: # condition: service_healthy # db: # image: postgres # restart: always # user: postgres # secrets: # - db-password # volumes: # - db-data:/var/lib/postgresql/data # environment: # - POSTGRES_DB=example # - POSTGRES_PASSWORD_FILE=/run/secrets/db-password # expose: # - 5432 # healthcheck: # test: [ "CMD", "pg_isready" ] # interval: 10s # timeout: 5s # retries: 5 # volumes: # db-data: # secrets: # db-password: # file: db/password.txt ``` Create a file named `.dockerignore` with the following contents. ```text {collapse=true,title=".dockerignore"} # Include any files or directories that you don't want to be copied to your # container here (e.g., local build artifacts, temporary files, etc.). # # For more help, visit the .dockerignore file reference guide at # https://docs.docker.com/go/build-context-dockerignore/ **/.classpath **/.dockerignore **/.env **/.git **/.gitignore **/.project **/.settings **/.toolstarget **/.vs **/.vscode **/.next **/.cache **/*.*proj.user **/*.dbmdl **/*.jfm **/charts **/docker-compose* **/compose.y*ml **/Dockerfile* **/node_modules **/npm-debug.log **/obj **/secrets.dev.yaml **/values.dev.yaml **/build **/dist LICENSE README.md ``` {{< /tab >}} {{< /tabs >}} You should now have at least the following contents in your `docker-nodejs-sample` directory. ```text ├── docker-nodejs-sample/ │ ├── spec/ │ ├── src/ │ ├── .dockerignore │ ├── .gitignore │ ├── compose.yaml │ ├── Dockerfile │ ├── package-lock.json │ ├── package.json │ └── README.md ``` To learn more about the files, see the following: - [Dockerfile](/reference/dockerfile.md) - [.dockerignore](/reference/dockerfile.md#dockerignore-file) - [compose.yaml](/reference/compose-file/_index.md) ## Run the application Inside the `docker-nodejs-sample` directory, run the following command in a terminal. ```console $ docker compose up --build ``` Open a browser and view the application at [http://localhost:3000](http://localhost:3000). You should see a simple todo application. In the terminal, press `ctrl`+`c` to stop the application. ### Run the application in the background You can run the application detached from the terminal by adding the `-d` option. Inside the `docker-nodejs-sample` directory, run the following command in a terminal. ```console $ docker compose up --build -d ``` Open a browser and view the application at [http://localhost:3000](http://localhost:3000). You should see a simple todo application. In the terminal, run the following command to stop the application. ```console $ docker compose down ``` For more information about Compose commands, see the [Compose CLI reference](/reference/cli/docker/compose/_index.md). ## Summary In this section, you learned how you can containerize and run your Node.js application using Docker. Related information: - [Dockerfile reference](/reference/dockerfile.md) - [.dockerignore file reference](/reference/dockerfile.md#dockerignore-file) - [Docker Compose overview](/manuals/compose/_index.md) ## Next steps In the next section, you'll learn how you can develop your application using containers.

This section details the creation of a `.dockerignore` file, which specifies files and directories to exclude from the Docker image build context. It lists common exclusions like node_modules, build artifacts, and sensitive files. It then confirms the expected file structure within the `docker-nodejs-sample` directory. Finally, it instructs the user on how to run the application using `docker compose up --build`, access it in a browser, and stop it, as well as how to run in detached mode and then stop it. A summary of the containerization process is given, with links to Dockerfile, .dockerignore, and Compose documentation.