ability to add optional env vars, labels and annotations (#9)

charts/jellyfin/values.yaml

@@ -122,3 +122,13 @@ extraVolumeMounts: []
   #- mountPath: /dev/dri/renderD129
   #  name: renderD129
 
+extraPodLabels: {}
+
+extraEnvVars: []
+  #- name: MY_ENV_VAR
+  #  value: my-env-var-value
+
+# additional annotations applied to the pod
+extraPodAnnotations: {}
+
+extraContainers: {}