docs/screenshots: add README.md for convenient viewing on GH

Signed-off-by: Martin Dummer <martin.dummer@gmx.net>

docs/screenshots/README.md

@@ -0,0 +1,71 @@
+# OpenDTU Screenshots
+
+here are some screenshots of OpenDTU's web interface.
+
+***
+
+![](01_LiveView.png)
+
+***
+
+![](02_NetworkAdmin.png)
+
+***
+
+![](03_NtpAdmin.png)
+
+***
+
+![](04_MqttAdmin.png)
+
+***
+
+![](05_InverterAdmin.png)
+
+***
+
+![](06_DtuAdmin.png)
+
+***
+
+![](07_FirmwareUpgrade.png)
+
+***
+
+![](08_NetworkInfo.png)
+
+***
+
+![](09_NtpInfo.png)
+
+***
+
+![](10_MqttInfo.png)
+
+***
+
+![](11_SystemInfo.png)
+
+***
+
+![](12_Eventlog.png)
+
+***
+
+![](13_InverterSettings.png)
+
+***
+
+![](14_ConfigManagement.png)
+
+***
+
+![](15_LimitSettings.png)
+
+***
+
+![](16_PowerSettings.png)
+
+***
+
+![](17_InverterInfo.png)