media: add wireguard preshared key support

custom_helm_charts/gluetun/values.yaml

@@ -15,6 +15,11 @@ env:
       secretKeyRef:
         name: gluetun-wireguard
         key: WIREGUARD_PRIVATE_KEY
+  - name: WIREGUARD_PRESHARED_KEY
+    valueFrom:
+      secretKeyRef:
+        name: gluetun-wireguard
+        key: WIREGUARD_PRESHARED_KEY
   - name: WIREGUARD_ADDRESSES
     value: "REPLACE_ME"
   - name: SERVER_HOSTNAMES
@@ -32,6 +37,7 @@ secret:
   create: true
   name: gluetun-wireguard
   privateKey: "REPLACE_ME"
+  presharedKey: "REPLACE_ME"
 
 service:
   type: ClusterIP