Enhance guidance for go proxy server in Dependabot

[alhss]

Added details on configuring private proxies and direct access for Go modules.

Why:

Improved documentation clarity for developers configuring Dependabot with private Go modules. The existing documentation lacked specific guidance on different proxy configurations and their trade-offs, leading to confusion about setup options and security implications.

What's being changed (if available, include any code snippets, screenshots, or gifs):

Enhanced the Notes section for Go module configuration with three distinct setup scenarios:

• Private Proxy Serving All Modules: Clarified proxy fallback behavior and limitations for JFrog-only modules
• Private Proxy Serving Private Modules: Added guidance on multiple registry configuration and security considerations
• Direct Access to Private Modules: Explained VCS authentication requirements and proper module publishing prerequisites

Added emphasis on GONOSUMDB requirement for private modules and clarified when VCS fallback will/won't work based on module publishing strategy.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

[welcome]

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

[github-actions]

How to review these changes 👓

Thank you for your contribution. To review these changes, choose one of the following options:

• Spin up a codespace
• Set up a local development environment

A Hubber will need to deploy your changes internally to review.

Table of review links

Note: Please update the URL for your staging server or codespace.

The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
code-security/dependabot/working-with-dependabot/guidance-for-the-configuration-of-private-registries-for-dependabot.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.17 3.16 3.15 3.14

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

🤖 This comment is automatically generated.

[Copilot]

Pull Request Overview

This PR enhances the documentation for configuring Go proxy servers with Dependabot by providing clearer, more structured guidance on different deployment scenarios. The changes help developers better understand their options when working with private Go modules and the security implications of each approach.

Key changes:

• Restructures the Notes section with three distinct proxy configuration scenarios
• Adds specific guidance on GONOSUMDB configuration and VCS fallback behavior
• Clarifies when different approaches work based on module publishing strategy

[Copilot]

Missing comma after 'for example'. The sentence should read 'but for private modules, for example, published to only a private repository like JFrog Artifactory, the VCS fall back will not work since they are only accessible through the proxy.'

Suggested change

**Private Proxy Serving All Modules**: All module requests go through your proxy first. For public modules fetching failures, your proxy returns 404/410 and Go falls back to direct version control system(VCS) access, but for private modules for example published to only a private repository like Jfrog artifactory. the VCS fall back will not work since they are only accessible through the proxy.

**Private Proxy Serving All Modules**: All module requests go through your proxy first. For public modules fetching failures, your proxy returns 404/410 and Go falls back to direct version control system (VCS) access, but for private modules, for example, published to only a private repository like JFrog Artifactory, the VCS fall back will not work since they are only accessible through the proxy.

[github-actions]

Thanks very much for contributing! Your pull request has been merged 🎉 You should see your changes appear on the site in approximately 24 hours. If you're looking for your next contribution, check out our help wanted issues ⚡