Overview

The following sections provide detailed steps on configuring and using Docker within the development environment for the gitlab-org/... repository. This guide emphasizes setting up and managing Docker containers to facilitate a seamless development process.

Prerequisites

• Ensure Docker is installed and running on your local machine.
• Have access to the repository gitlab-org/....

Setting Up the Development Environment

1. Clone the Repository

   Begin by cloning the repository to your local development machine:

   git clone https://gitlab.com/gitlab-org/...
   cd ...
   

2. Dockerfile

   Inspect the Dockerfile located in the root directory of the repository. This file provides the necessary instructions to build the Docker image for the development environment. Here’s a sample snippet:

   FROM node:14
   
   WORKDIR /app
   
   COPY package*.json ./
   RUN npm install
   
   COPY . .
   
   EXPOSE 8080
   CMD ["npm", "start"]
   

   The above configuration sets the base image to Node.js 14, creates a working directory, installs dependencies, and starts the application.

3. Building the Docker Image

   To build the Docker image, run the following command in the repository’s root directory:

   docker build -t my-app:latest .
   

   This command tags the image as my-app with the latest tag.

4. Running the Docker Container

   Once the image is built, you can run the container using:

   docker run -p 8080:8080 my-app:latest
   

   This maps port 8080 on your host to port 8080 in the container.

5. Docker Compose Setup

   If the project requires multiple services, a docker-compose.yml file will typically be present. Here’s an example configuration:

   version: '3.8'
   
   services:
     web:
       build: .
       ports:
         - "8080:8080"
       volumes:
         - .:/app
       environment:
         NODE_ENV: development
   

   This setup specifies the build context, mapping of ports, and volume bindings to enable live development.

6. Starting Services with Docker Compose

   Use the following command to start all services defined in the docker-compose.yml:

   docker-compose up
   

   This command launches the application and its dependencies as specified in the configuration file.

7. Accessing the Application

   After the container is running, access your application in a web browser at:

   http://localhost:8080
   

8. Stopping the Docker Containers

   To stop the running containers, use:

   docker-compose down
   

   This command stops and removes the containers created by docker-compose up.

Conclusion

The outlined steps detail how Docker is configured and used within the development environment of the gitlab-org/... repository.

Source of Information: gitlab-org/…