More details for newbies

[AlexiyOrlov]

What article on docs.github.com is affected?

https://docs.github.com/en/free-pro-team@latest/actions/creating-actions/creating-a-docker-container-action

What part(s) of the article would you like to see updated?

As a total newbie to actions and Docker, I made a couple of silly mistakes when trying out the example.
First, in the entrypoint.sh file, I wrote -1 instead of -l.
Second, the docker couldn't run the .sh file because of permissions, so I had to add RUN chmod +x /entrypoint.sh to the dockerfile.
Also line uses: actions/hello-world-docker-action@v1 shows how to use published action. You should add that unpublished action is used via uses: [username]/[reponame]@version.
So I think these 3 things should be pointed out there.

[welcome]

Thanks for opening this issue. A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[janiceilene]

Thanks for opening an issue @AlexiyOrlov! I'll triage this for the right team to take a look.

[runleonarun]

Hi @AlexiyOrlov! Thanks for this issue. I'd definitely like to smooth out the process for newbies!

Second, the docker couldn't run the .sh file because of permissions, so I had to add RUN chmod +x /entrypoint.sh to the dockerfile.

🤔 We do have that in Step 2 where it tells you how to make the file executable.

Here are some suggestions for the other two ideas:

First, in the entrypoint.sh file, I wrote -1 instead of -l.

Because we do use "l" and not "1" in the example, I don't think we need to add any explanatory text. One thought is that we could add {:copy} to this code snippet so the copy icon shows up like it does here. For example:

```shell{:copy}

Also line uses: actions/hello-world-docker-action@v1 shows how to use published action. You should add that unpublished action is used via uses: [username]/[reponame]@Version.

This absolutely can be added to the docs! Thank you for suggesting it.

[avinal]

I would like to work on this issue if no one is working on it.

[janiceilene]

I don't see any open PRs for this issue, please feel free to open one @avinal 💖

[avinal]

I have added a pr please take a look.

[AlexiyOrlov]

Ah, no problem.

[himanshu211raj]

I like to work on this issue if no one working on it! As I am a beginner and need some guidance regarding how to contribute to open source.