Add the serviceAccountBaseUrl option into the readme

Author: ondbeh

README.md

@@ -185,6 +185,7 @@ spec:
             authTokenSecretKey: string
             authTokenSecretNamespace: string
             serviceAccountKeyPath: string
+            serviceAccountBaseUrl: string
             acmeTxtRecordTTL: int64
 ```
 
@@ -195,6 +196,7 @@ spec:
 - authTokenSecretKey: The key within the secret containing the STACKIT authentication token. (Default: auth-token)
 - authTokenSecretNamespace: The namespace of the secret containing the STACKIT authentication token. (Default: cert-manager)
 - serviceAccountKeyPath: The path to the service account key file. The file must be mounted into the container.
+- serviceAccountBaseUrl: The base URL for the STACKIT service account API. (Default: https://service-account.api.stackit.cloud/token)
 - acmeTxtRecordTTL: The TTL for the ACME TXT record. (Default: 600)
 
 ## Test Procedures

internal/resolver/config.go

@@ -21,11 +21,11 @@ type defaultConfigProvider struct {
 type StackitDnsProviderConfig struct {
 	ProjectId                string `json:"projectId"`
 	ApiBasePath              string `json:"apiBasePath"`
-	ServiceAccountBaseUrl    string `json:"serviceAccountBaseUrl"`
 	AuthTokenSecretRef       string `json:"authTokenSecretRef"`
 	AuthTokenSecretKey       string `json:"authTokenSecretKey"`
 	AuthTokenSecretNamespace string `json:"authTokenSecretNamespace"`
 	ServiceAccountKeyPath    string `json:"serviceAccountKeyPath"`
+	ServiceAccountBaseUrl    string `json:"serviceAccountBaseUrl"`
 	AcmeTxtRecordTTL         int64  `json:"acmeTxtRecordTTL"`
 }