3ndrius / cra_docker Goto Github PK

This project was bootstrapped with Create React App.

• build a image

docker build -t sample:dev .

• show images

docker images

• run container

docker run \ -it \ --rm \ -v ${PWD}:/app \ -v /app/node_modules \ -p 3000:3000 \ -e CHOKIDAR_USEPOLLING=true \ sample:dev

The docker run command creates and runs a new container instance from the image we just created.

• it starts the container in interactive mode. Why is this necessary? As of version 3.4.1, react-scripts exits after start-up (unless CI mode is specified) which will cause the container to exit. Thus the need for interactive mode.

• --rm removes the container and volumes after the container exits.

• -v ${PWD}:/app mounts the code into the container at “/app”.

• {PWD} may not work on Windows.

Since we want to use the container version of the “node_modules” folder, we configured another volume: -v /app/node_modules. You should now be able to remove the - local “node_modules” flavor.

• -p 3000:3000 exposes port 3000 to other Docker containers on the same network (for inter-container communication) and port 3001 to the host.

• -e CHOKIDAR_USEPOLLING=true enables a polling mechanism via chokidar (which wraps fs.watch, fs.watchFile, and fsevents) so that hot-reloading will work.

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