Add some docs (#198)

docs/administration/healthcheck.md

@@ -0,0 +1,13 @@
+# Healthcheck
+
+A healthcheck is a simple HTTP GET request to the `/healthcheck` endpoint. It returns a `200 OK` response if the server is healthy.
+
+## Example
+
+```shell
+curl http://localhost:6157/healthcheck
+```
+
+```json
+{"database":"ok","opengist":"ok","time":"2024-01-04T05:18:33+01:00"}
+```

docs/administration/oauth-providers.md

@@ -4,8 +4,8 @@ Opengist can be configured to use OAuth to authenticate users, with GitHub, Gite
 
 ## Github
 
-* Add a new OAuth app in your [Github account settings](https://github.com/settings/applications/new)
-* Set 'Authorization callback URL' to `http://opengist.domain/oauth/github/callback`
+* Add a new OAuth app in your [GitHub account settings](https://github.com/settings/applications/new)
+* Set 'Authorization callback URL' to `http://opengist.url/oauth/github/callback`
 * Copy the 'Client ID' and 'Client Secret' and add them to the [configuration](/docs/configuration/cheat-sheet.md) :
   ```yaml
   github.client-key: <key>
@@ -16,7 +16,7 @@ Opengist can be configured to use OAuth to authenticate users, with GitHub, Gite
 ## GitLab
 
 * Add a new OAuth app in Application settings from the [GitLab instance](https://gitlab.com/-/user_settings/applications)
-* Set 'Redirect URI' to `http://opengist.domain/oauth/gitlab/callback`
+* Set 'Redirect URI' to `http://opengist.url/oauth/gitlab/callback`
 * Copy the 'Client ID' and 'Client Secret' and add them to the [configuration](/docs/configuration/cheat-sheet.md) :
   ```yaml
   gitlab.client-key: <key>
@@ -29,7 +29,7 @@ Opengist can be configured to use OAuth to authenticate users, with GitHub, Gite
 ## Gitea
 
 * Add a new OAuth app in Application settings from the [Gitea instance](https://gitea.com/user/settings/applications)
-* Set 'Redirect URI' to `http://opengist.domain/oauth/gitea/callback`
+* Set 'Redirect URI' to `http://opengist.url/oauth/gitea/callback`
 * Copy the 'Client ID' and 'Client Secret' and add them to the [configuration](/docs/configuration/cheat-sheet.md) :
   ```yaml
   gitea.client-key: <key>
@@ -42,7 +42,7 @@ Opengist can be configured to use OAuth to authenticate users, with GitHub, Gite
 ## OpenID Connect
 
 * Add a new OAuth app in Application settings of your OIDC provider
-* Set 'Redirect URI' to `http://opengist.domain/oauth/openid-connect/callback`
+* Set 'Redirect URI' to `http://opengist.url/oauth/openid-connect/callback`
 * Copy the 'Client ID', 'Client Secret', and the discovery endpoint, and add them to the [configuration](/docs/configuration/cheat-sheet.md) :
   ```yaml
   oidc.client-key: <key>