Set referrer-policy header

As per Nextcloud official recommendations

templates/Nextcloud/0/docker-compose.yml

@@ -20,13 +20,16 @@ services:
       {{- end}}
       {{- if .Values.TRAEFIK_HOST}}
       traefik.enable: true
-      traefik.frontend.rule: Host:${TRAEFIK_HOST}
+      ### Start Web Segment
       traefik.frontend.entryPoints: http,https
       traefik.frontend.headers.forceSTSHeader: true
+      traefik.frontend.headers.referrerPolicy: no-referrer
       traefik.frontend.headers.SSLRedirect: true
       traefik.frontend.headers.STSPreload: true
       traefik.frontend.headers.STSSeconds: 15552000
+      traefik.frontend.rule: Host:${TRAEFIK_HOST}
       traefik.port: "80"
+      ### End Web Segment
       {{- else}}
       traefik.enable: false
       {{- end}}