docs: add npx prefix before react-native command

[szymonrybczak]

Summary:

Closes #2031

There are people who just copy and pastes commands from docs, and it is not allowed to have globally installed react-native package, so I synced every command in docs, warning and errors - to have npx prefix before react-native for those who just copy and pastes commands into terminal :)

Test Plan:

Just read it :)

Checklist

• Documentation is up to date to reflect these changes.
• Follows commit message convention described in CONTRIBUTING.md

[liamjones]

Considering what you said in the issue comment; should these all be react-native@latest as well?

[szymonrybczak]

Hm, yeah I wrote that, but I was wondering is it actually correct and I think we should only add @latest to init command - cc. @thymikee @kelset @cortinico please correct me if I'm wrong. (I know that this was discussed somewhere, but unfortunately I can't find this discussion)

[kelset]

init should be the only command to run with npx, and yes it should have the @-latest

see this PR for more details -> facebook/react-native-website#3732

[szymonrybczak]

init should be the only command to run with npx, and yes it should have the @-latest

Okay, thanks for information. I don't know if it is doable but I think we should somehow "block" running any command besides init outside of project - because it doesn't make sense to allow that.

[cortinico]

only add @latest to init command - cc. @thymikee @kelset @cortinico please correct me if I'm wrong.

That's correct

Accidentally accepted

[szymonrybczak]

Update: I added yarn before every usage of react-native for users that just copy and pastes and I'll create additional PR to block usage of commands outside of React Native app (besides init command).

[szymonrybczak]

init should be the only command to run with npx, and yes it should have the @-latest

After internal talk with @thymikee, actually what is the reason behind this we should only use npx with init command? If I understand correctly if we're using npx react-native ... in project it should select correct version.

The problem is that when we're saying to users to use either npm / yarn to run commands, in case of npm there's a problem because user needs to add command to scripts field in package.json ;/ With yarn it is easier, because we can just do yarn react-native ... cc. @kelset

[szymonrybczak]

Hey, so after internal discussion, the conclusion is:

• it is safe to use npx inside project, it'll select correct version of CLI,
• when initialising project with init command we should add @latest to make sure user is using the latest CLI, not the cached one.

I updated this PR to match above requirements. cc. @kelset @cortinico mind looking at changes? 🙏

[thymikee]

@huntie this modifies README of metro plugin slightly, please make sure to adjust this in the core