docs: resolve broken links

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2553>

CONTRIBUTING.md

@@ -8,7 +8,7 @@ The Funkwhale software is the core of the community project. While we have a cor
 
 Funkwhale's backend is written in [Python](https://www.python.org/) using [Django](https://www.djangoproject.com) and [Django REST framework](https://www.django-rest-framework.org/). Our web app is written in [Vue.js](https://vuejs.org/) and [Typescript](https://typescriptlang.org).
 
-Whether you're an experienced developer or you're just learning, check out our [developer guide](https://docs.funkwhale.audio/developers/index.html) to get started.
+Whether you're an experienced developer or you're just learning, check out our [developer guide](https://docs.funkwhale.audio/developer/index.html) to get started.
 
 ## Document Funkwhale
 

README.md

@@ -10,7 +10,7 @@ Want to help make Funkwhale even better? We welcome contributions from across th
 
 You can find contribution information in our [documentation hub](https://docs.funkwhale.audio).
 
-- [Developer guides](https://docs.funkwhale.audio/developers/index.html)
+- [Developer guides](https://docs.funkwhale.audio/developer/index.html)
 - [Contributor guides](https://docs.funkwhale.audio/contributing.html)
 
 ## Get help

api/Readme.md

@@ -32,7 +32,7 @@ Each API call returns HTTP headers to pass the following information:
 - How many more requests in the scope can be made within the rate-limit timeframe (`X-RateLimit-Remaining`)
 - How much time does the client need to wait to send another request (`Retry-After`)
 
-For more information, check our [rate limit documentation](https://docs.funkwhale.audio/admin/configuration.html#api-configuration)
+For more information, check our [rate limit documentation](https://docs.funkwhale.audio/developer/api/rate-limit.html)
 
 ## Resources
 

docs/redirects.txt

@@ -54,3 +54,6 @@ translators.html, ../contributor/translation.html
 federation.html, ../developer/federation/index.html
 upgrading.html, ../administrator/upgrade/index.html
 administrator_documentation/upgrade_docs/docker.html, ../../administrator/upgrade/docker.html
+upgrading/0.17.html, ../user/libraries/index.html
+admin/external-storages.html, ../../administrator/configuration/object-storage.html
+admin/external-storage.html#no-resolver-found, ../../administrator/configuration/object-storage.html#troubleshooting