# Ionic Capacitor with Docker This guide explains how to set up Docker support for an Ionic Capacitor project, including optional Docker Compose usage. --- ## 1. Prepare Your Ionic Capacitor Project First, create a new Ionic project and enable Capacitor integration: ```bash ionic start myApp blank --type=angular cd myApp ionic integrations enable capacitor

In the root directory of your project, create a Dockerfile. Below is an example of a basic Dockerfile for an Ionic Capacitor app:

# Use Node.js as the base image FROM node:alpine AS build # Set the working directory inside the container WORKDIR /app # Copy package.json and package-lock.json COPY package*.json ./ # Install dependencies RUN npm install # Copy the project files into the container COPY . . # Build the Ionic app RUN npm run build # Use Nginx to serve the built app FROM nginx:alpine # Copy the built app from the build stage COPY --from=build /app/www /usr/share/nginx/html # Expose port 80 EXPOSE 80 # Start the Nginx server CMD ["nginx", "-g", "daemon off;"]

To optimize the Docker image size, exclude unnecessary files by creating a .dockerignore file in the root directory with the following content:

node_modules platforms android ios build 

Build the Docker image with the following command:

docker build -t ionic-capacitor-app .

Run the Docker container and map port 8080 to port 80:

docker run -p 8080:80 ionic-capacitor-app

The app will now be accessible at:

http://localhost:8080 

To simplify the build and run process, you can use docker-compose. Create a docker-compose.yml file with the following content:

version: '3.8' services: app: build: . ports: - "8080:80"

Run the app using Docker Compose:

docker-compose up --build

1. Clean Up Unused Docker Images, Containers, Volumes, and Networks To remove all unused images, containers, volumes, and networks (dangling resources), use the following command:

docker system prune -a This will:

Remove all stopped containers Remove all unused networks Remove all dangling images (images not tagged or not used by any container) Remove all unused volumes (volumes that are not referenced by any containers) Warning: This will delete a lot of data, including unused images, which might take up considerable space.

2. Remove Only Dangling Images To remove dangling (unused) images only (images that are not associated with a container):

docker image prune To also remove unused images (not just dangling images), use the -a flag:

docker image prune -a 3. Remove Unused Containers To remove stopped containers:

docker container prune 4. Remove Unused Volumes To remove unused volumes:

docker volume prune 5. Remove Unused Networks To remove unused networks:

docker network prune 6. Remove All Unused Data If you want to ensure that everything unused is removed, you can use the following:

docker system prune --volumes This will remove all unused containers, networks, images, and volumes.

• Use Docker to containerize your Ionic Capacitor app.
• Serve the app using Nginx inside a Docker container.
• Optionally, use Docker Compose for simplified management.

Enjoy building your Ionic Capacitor project with Docker!