Fix Dozzle WebSocket connectivity by forcing IPv4 upstream

oauth2-proxy was resolving localhost to IPv6 [::1]:8080 instead of
IPv4 127.0.0.1:8080, causing connection refused errors on the streaming
endpoints (/api/events/stream and /api/hosts/.../logs/stream).

Changed upstream URL from http://localhost:8080 to http://127.0.0.1:8080
to force IPv4 resolution.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/dozzle/deployment.yaml

@@ -56,7 +56,7 @@ spec:
           protocol: TCP
         args:
         - --http-address=0.0.0.0:4180
-        - --upstream=http://localhost:8080
+        - --upstream=http://127.0.0.1:8080
         - --provider=oidc
         - --oidc-issuer-url=https://auth.basicstack.de
         - --redirect-url=https://dozzle.basicstack.de/oauth2/callback