How to add cypress into my current docker?

If you're using docker-compose, the cleaner solution is to just use a separate, dedicated Cypress Docker container, so your docker-compose.yml becomes:

version: '2'services:  web:    build: .    entrypoint: npm run dev    volumes:      - .:/usr/app      - /usr/app/node_modules    ports:      - "8080:8080"  cypress:    image: "cypress/included:3.2.0"    depends_on:      - web    environment:      - CYPRESS_baseUrl=http://web:8080    working_dir: /e2e    volumes:      - ./:/e2e

The e2e directory should contain your cypress.json file and your integration/spec.js file. Your package.json file doesn't have to include Cypress at all because it's baked into the Cypress Docker image (cypress/included).

For more details, I wrote a comprehensive tutorial on using Docker Compose with Cypress:

• "End-to-End Testing Web Apps: The Painless Way"

Running into a similar issue with a similar set up

The way I temporarily fixed it was by manually going into the folder containing my node_modules folder and running node_modules/.bin/install, from there you should be able to open it with node_modules/.bin/open or $(npm bin)/cypress open.

Tried setting up a separate cypress container on my docker-compose as such

cypress:    build:        context: .        dockerfile: docker/cypress    depends_on:        - node    volumes:        - .:/code

with the dockerfile being Cypress's prebuilt docker-container

Was able to get docker-compose exec cypress node_modules/.bin/cypress verify to work, but when I try to open Cypress it just hangs.

Hope this helps OP, but hope someone can provide a more concrete answer that will help us run Cypress fully through docker

You can also use an already existing cypress image on docker hub and build it in docker compose. Personnaly I avoid adding it directly in compose, I create a separate docker file for cypress.