Permission denied!

[ghost]

Hi!

1. I write simple test:

import { Application } from 'https://deno.land/x/abc@v1.2.4/mod.ts'

const app = new Application()

const test = 'Test string'
const encoder = new TextEncoder()
const data = encoder.encode(test)

app.get('/', async (c) => {
    await Deno.writeFile('test.txt', data)
    return test
})

app.start({ 
    port: 8080 
})

it allows you to understand how the file is being created and written.

2. Dockerfile

FROM hayd/alpine-deno:1.7.2
EXPOSE 8080
WORKDIR /app
USER deno
ADD . .
RUN deno cache app.js
CMD ["run", "--allow-net", "--allow-read", "--allow-write", "app.js"]

3. Run command in your example: docker build -t app . && docker run -it --init -p 8080:8080 app

Without writing files, everything works fine, but if create and write files, I see an error:

I test this example with Alpine Linux & CentOS
I'm doing this for the first time, maybe it's a simple task, but please tell me how to fix it?

[hayd]

By default:

USER deno

won't have access to write files. This is by design.

What you should do is either remove the USER deno or set the permissions of /app (or another directory) to be writable by the deno user e.g. something like chown -R deno /app.

[ghost]

thank you very much!
You've helped me a lot!