docs: refresh repository support and community links (#1349)

Co-authored-by: Paul Nothaft <[email protected]>

SUPPORT.md

@@ -0,0 +1,33 @@
+# Getting help with PicPeak
+
+## Documentation
+
+Start with [docs.picpeak.app](https://docs.picpeak.app) for installation,
+configuration, gallery features and administration guides.
+
+- [Getting started](https://docs.picpeak.app/getting-started)
+- [Deployment](https://docs.picpeak.app/deployment)
+- [Admin settings](https://docs.picpeak.app/guides/admin-settings)
+- [Release channels](https://docs.picpeak.app/deployment/release-channels)
+
+## Questions and troubleshooting
+
+Use [GitHub Discussions](https://github.com/PicPeak/picpeak/discussions) for
+setup questions, troubleshooting and advice from the community. Include your
+PicPeak version, deployment method and what you have already tried.
+
+## Bugs and feature requests
+
+Search [existing issues](https://github.com/PicPeak/picpeak/issues) first, then
+[choose an issue template](https://github.com/PicPeak/picpeak/issues/new/choose)
+to report a bug, suggest a feature or identify a documentation problem.
+
+For bugs, include the exact version, reproduction steps and relevant logs.
+See [Contributing](CONTRIBUTING.md) for development and pull request guidance.
+
+## Security vulnerabilities
+
+Follow the [security policy](SECURITY.md) and use
+[private vulnerability reporting](https://github.com/PicPeak/picpeak/security/advisories/new)
+or email **[email protected]**. Do not report vulnerabilities in public issues
+or discussions.