Docker container shutting down with logs "SyntaxError: Unexpected token '<'"

[keeplearningdocker]

So I’m new with docker and I’m running a very simple react app just so I can test my grounds and learn the fundamentals. BUT I’ve been stuck on this error for 2 days now.

My docker container exits after run immediately with a syntax error in index.js

Here is an overview :

• *I used create react app and simply added some components
• *Built a docker file this way (this is only the first step of the tutorial I’m following)

FROM node:15
WORKDIR /app
COPY package.json .
RUN npm install npm
COPY ./src ./
EXPOSE 3000
CMD [“node”, “index.js”]

• *I run my image with this command docker build -t node-app-image .

• *I run my container with this command docker run -d -p 3000:3000 --name node-app node-app-image
  *This is my package.json :
  

  

• THIS IS THE error with docker logs :
  file:///app/index.js:9
  <React.StrictMode>
  ^
  SyntaxError: Unexpected token ‘<’
  at Loader.moduleStrategy (node:internal/modules/esm/translators:147:18)
  at async link (node:internal/modules/esm/module_job:48:21)

• *PS: I’m using ubuntu 20.4

[keeplearningdocker]

I forgot to add the index.js file, here you go :

There is really nothing changed from initial create-react-app

[mharsh14]

Hi, I’m facing same error.

Did you find solution for it?

[rimelek (Ákos Takács)]

It was a nodejs syntax error. It just happened to run in a container, so you can find solutions on Google without containers too

ReactJS Module build failed: SyntaxError: Unexpected token - ReactDOM.render

Even if it doesn’t help, a NodeJS developer will help you more easily who knows what that syntax requires.