Change Grafana Loki env var

Author: LEDfan

src/main/kotlin/eu/openanalytics/shinyproxyoperator/impl/docker/monitoring/GrafanaLokiConfig.kt

@@ -38,7 +38,7 @@ class GrafanaLokiConfig(private val dockerClient: DockerClient,
                         config: Config) {
 
     private val logger = KotlinLogging.logger {}
-    private val lokiImage: String = config.readConfigValue("docker.io/grafana/loki:3.2.2", "SPO_GRAFANA_GRAFANA_IMAGE") { it }
+    private val lokiImage: String = config.readConfigValue("docker.io/grafana/loki:3.2.2", "SPO_GRAFANA_LOKI_IMAGE") { it }
     private val fileManager = FileManager()
     private val containerName = "sp-grafana-loki"
     private val dataDir: Path = mainDataDir.resolve(containerName)