CORS error

[gabboraron]

Hi, I tried to use it with the docker version and when I started the docker I got:

{"level":"error","message":"Unexpected Error Not allowed by CORS","stack":"Error: Not allowed by CORS\n    at origin (file:///app/server/setup.js:84:18)\n    at /app/node_modules/cors/lib/index.js:219:13\n    at optionsCallback (/app/node_modules/cors/lib/index.js:199:9)\n    at corsMiddleware (/app/node_modules/cors/lib/index.js:204:7)\n    at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5)\n    at trim_prefix (/app/node_modules/express/lib/router/index.js:328:13)\n    at /app/node_modules/express/lib/router/index.js:286:9\n    at Function.process_params (/app/node_modules/express/lib/router/index.js:346:12)\n    at next (/app/node_modules/express/lib/router/index.js:280:10)\n    at /app/node_modules/express/lib/router/index.js:646:15","timestamp":"2025-05-23T19:22:25.573Z"}

[joepuzzo]

Make sure you have latest Code. I just ran with docker on my computer and its working.

Build / Deploy

This project contains a Dockerfile that can be built with:

npm run build:docker

To run it locally simply run

npm run run:docker

[joepuzzo]

Oh I think I know whats going on

Make sure you have a file called .env with the following contents

NODE_ENV=dev

[gabboraron]

Thanks, the .env helped me a lot, also, I can report some bugs here:

• this didn't worked for me: sudo npm run build:docker instead of it I used: sudo docker build -t robot-viewer .
• starting of the docker wasn't worked like this: sudo npm run run:docker, but it worked with: docker run --env-file=.env -p 3000:3000 robot-viewer

now working on: http://localhost:3000

[joepuzzo]

do you have npm installed ( node ) on your computer ? Also mac or PC ?

[gabboraron]

ubuntu based linux, yes I have, npm@8.5.1 /usr/share/nodejs/npm

Also,

$ docker --version
Docker version 28.1.1, build 4eba377