Docker Configuration for helixml/live-coding

To configure Docker within the development environment for helixml/live-coding, follow the steps outlined below. This documentation provides detailed code examples and configurations necessary to set up Docker effectively for your development workflow.

Prerequisites

Ensure that Docker is installed and running on your machine. You can verify your installation by running:

docker --version

Setting Up Your Development Environment

Clone the Repository

First, you need to clone the helixml/live-coding repository to your local machine:
```
git clone https://github.com/helixml/live-coding.git
cd live-coding
```

Create a Dockerfile

In the root of your project, create a Dockerfile. This file defines the environment that your application will run in:

# Using an official Node.js runtime as a parent image
FROM node:14

# Set the working directory
WORKDIR /usr/src/app

# Copy package.json and package-lock.json
COPY package*.json ./

# Install app dependencies
RUN npm install

# Copy the rest of your application code
COPY . .

# Expose the port the app runs on
EXPOSE 3000

# Command to run the app
CMD ["npm", "start"]

Create a .dockerignore File

This file tells Docker which files and directories to ignore during the build process. Create a .dockerignore file to exclude unnecessary files:
```
node_modules
npm-debug.log
Dockerfile
.dockerignore
```
Build the Docker Image

With your Dockerfile in place, you can now build your Docker image. Run this command in your terminal:
```
docker build -t helixml-live-coding .
```
This command builds the Docker image using the current directory (.) context, tagging it as helixml-live-coding.
Running the Docker Container

After building your image, you can run it in a container. Use the following command:
```
docker run -p 3000:3000 -d helixml-live-coding
```
This command runs the container in detached mode (-d), mapping port 3000 of the container to port 3000 on your host.
Accessing the Application

The application should now be accessible at http://localhost:3000. Open a web browser and visit this URL to verify that your application is running correctly.
Using Docker Compose for Complex Applications

If your application requires multiple services (like a database), using Docker Compose can simplify the management of your containers. Create a docker-compose.yml file:
```
version: '3'

services:
  app:
    build: .
    ports:
      - "3000:3000"
    volumes:
      - .:/usr/src/app
    environment:
      - NODE_ENV=development

  db:
    image: mongo
    ports:
      - "27017:27017"
```
Build and start all services with:
```
docker-compose up
```
This command starts both your application and MongoDB as defined in the docker-compose.yml file.
Stopping the Containers

To stop the containers created by Docker Compose, use the following command:
```
docker-compose down
```

This stops and removes the containers defined in the docker-compose.yml file.

Accessing Logs

To view logs from your running application, you can use:
```
docker logs <container_id>
```
Replace <container_id> with the actual ID or name of your running container.
Debugging Issues

If you encounter issues while working with Docker, inspect the running containers and their statuses by executing:
```
docker ps
```
For further diagnosis, connect to a running container for shell access:
```
docker exec -it <container_id> /bin/bash
```

By following these steps, you can effectively configure and use Docker in your development environment for helixml/live-coding.

Source: helixml/live-coding