mermaid web-data connection classes made

server/web-data-connection/PythonMermaid.md

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+```mermaid
+classDiagram
+    Node <|-- SensorNode
+    Node <|-- EnqueteNode
+    Node: + String macAddress
+    Node: +getNodeID()
+    class SensorNode{
+        + Float temp
+        + Float Eco2
+        + Float Tvoc
+        + Float humi
+        - String query
+        +processSensorNodeData()
+    }
+
+    class EnqueteNode{
+        + Int result
+        +  Int questionID
+        - String query
+        + ProcessEnqueteNodeData()
+    }
+```