Merge branch 'it18218640' into 'master'

create _Keyword_Spotting_Service s class

See merge request !41

backend/IT18218640/keyword_spotting_service.py

 import tensorflow.keras as keras
 import numpy as np
-import librosa
\ No newline at end of file
+import librosa
+
+MODEL_PATH = "model.h5"
+NUM_SAMPLES_TO_CONSIDER = 22050 # 1 sec
+
+class _Keyword_Spotting_Service:
+
+    model = None
+    _mappings = [
+        "black",
+        "blue",
+        "green",
+        "red",
+        "white",
+        "yellow"
+    ]
+    _instance = None