hints.md: update qt-kiosk-browser section

Signed-off-by: Mikhail Vanyulin <mikhail.vanyulin@rtsoft.de>

hints.md

@@ -1059,9 +1059,24 @@ qt5-opengles2-test
 # Preperation
 systemctl stop seco-show-demo
 
-sed -i 's/"URL":.*$/"URL": "https:\/\/north.seco.com\/suchen?",/' /etc/qt-kiosk-browser.conf
+# Set a proper URL in /etc/qt-kiosk-browser.conf.
+For example by manually setting a following in a file via text editor:
+"URL": "https://edge.seco.com/de/"
+
+Or by running a following command from Linux command line:
+sed -i 's/"URL":.*$/"URL": "https:\/\/edge.seco.com\/de\/",/' /etc/qt-kiosk-browser.conf
+
+# Start browser from console:
 qt-kiosk-browser /etc/qt-kiosk-browser.conf --no-sandbox
+
+# Start browser using provided service:
+systemctl start qt-kiosk-browser
+
 # You can verfiy the virtual keyboard functionality by clicking the search field and entering text
+
+# To make qt-kiosk-browser to start automatically after boot instead of seco-show-demo, run following commands and reboot:
+systemctl disable seco-show-demo
+systemctl enable qt-kiosk-browser
 ```
 
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