Replace hosting with deploy prompt in init command

[charlotteliang]

Tested locally that it no longer retrieves hosting guide and directed to app hosting prompt successfully

[gemini-code-assist]

Summary of Changes

Hello @charlotteliang, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request refines the guidance provided within the backend initialization process by adjusting how deployment is presented. It removes the specific instruction to set up Firebase Hosting as part of the initial service configuration. Instead, it introduces a more general recommendation to use a deploy prompt for application deployment once the core services like Firestore and Authentication are configured, aiming to streamline the initial setup experience.

Highlights

• Guide Content Update: The init_backend guide has been updated to remove the explicit mention of 'Hosting' as a service to set up during initial backend configuration.
• Hosting Guide Removal: The dedicated guide link for Firebase Hosting setup has been removed from the initialization instructions.
• New Deployment Guidance: A new 'Next Steps' section has been added, recommending users to utilize a general deploy prompt for deploying their application after initial setup.

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[gemini-code-assist]

Code Review

This pull request updates the backend initialization guide by removing the explicit step for setting up Hosting and instead pointing the user towards using a deploy prompt. The change is good, but it leaves a conflicting instruction about deployment. I've added a comment to resolve this ambiguity.

[joehan]

Some thoughts on this. Additonally, can you include some evidence that this works in the PR description?