Dockerfile.dev

# image name : react-image

FROM node:14.18.0-alpine

# setting work directory in container 
WORKDIR /app

# now to copy files from our project folder to container ,by dot means current folder on container

COPY package.json .

#running the command tht needed to install dependencies (depends on project but basically commands that we need to run before running the main appplicaton)

RUN npm install

#now copying all the project files from current folder to current folder in container
COPY . .

#we need to expose our main OS's port to the container , like here our 3000 port 

#EXPOSE 3000

#to run our main application

CMD ["npm","start"]