docs: replace troubleshooting.md with posts

Refs: npm#5

.github/issue_template.md

@@ -40,8 +40,8 @@
     Thank you for contributing to npm! Please review this checklist
     before submitting your issue.
 
-    - Please check if there's a solution in the troubleshooting wiki:
-      https://github.com/npm/npm/blob/latest/TROUBLESHOOTING.md
+    - Please check if there's a solution in the troubleshooting posts on npm.community:
+      https://npm.community/c/support/troubleshooting
 
     - Also ensure that your new issue conforms to npm's contribution guidelines:
       https://github.com/npm/npm/blob/latest/CONTRIBUTING.md

CONTRIBUTING.md

@@ -35,7 +35,7 @@ This includes anyone who may show up to the npm/npm repo with issues, PRs, comme
 * Comment on issues when they have a reference to the answer.
 * If community members aren't sure they are correct and don't have a reference to the answer, please leave the issue and try another one.
 * Defer to collaborators and npm employees for answers.
-* Make sure to search for [the troubleshooting doc](./TROUBLESHOOTING.md) and search on the issue tracker for similar issues before opening a new one.
+* Make sure to search for [the troubleshooting posts on npm.community](https://npm.community/c/support/troubleshooting) and search on the issue tracker for similar issues before opening a new one.
 * Any users with urgent support needs are welcome to email support@npmjs.com, and our dedicated support team will be happy to help.
 
 PLEASE don't @ collaborators or npm employees on issues. The CLI team is small, and has many outstanding commitments to fulfill.

README.md

@@ -87,8 +87,7 @@ Many improvements for Windows users have been made in npm 3 - you will have a be
 experience if you run a recent version of npm. To upgrade, either use [Microsoft's
 upgrade tool](https://github.com/felixrieseberg/npm-windows-upgrade),
 [download a new version of Node](https://nodejs.org/en/download/),
-or follow the Windows upgrade instructions in the
-[npm Troubleshooting Guide](./TROUBLESHOOTING.md).
+or follow the Windows upgrade instructions in [the troubleshooting posts on npm.community](https://npm.community/c/support/troubleshooting).
 
 If that's not fancy enough for you, then you can fetch the code with
 git, and mess with it directly.