Add app.py, backend, and model for HF Space

backend/train_model.py

@@ -19,11 +19,12 @@ from sklearn.metrics import (
 from sklearn.linear_model import LogisticRegression
 from sklearn.tree import DecisionTreeClassifier
 from sklearn.ensemble import RandomForestClassifier, BaggingClassifier
-from utils import (
-ensure_dirs, save_json, plot_cm, plot_roc, barplot_metric,
-lineplot_curves
+from .utils import (
+    ensure_dirs, save_json, plot_cm, plot_roc, barplot_metric,
+    lineplot_curves
 )
 
+
 # ------------------------------
 # Paths
 # ------------------------------