Amend ci/cd, update predict.py

Author: FunnyRabbitIsAHabbit

.github/workflows/run_test.yaml

@@ -28,4 +28,4 @@ jobs:
         continue-on-error: true
       - name: Generate Coverage Report
         run: |
-          coverage report -m
+          pip install coverage && coverage report -m

predict.py

@@ -36,7 +36,11 @@ def __init__(self: Self, env_file_path: str = None) -> None:
 
         # If .env filepath is supplied, use it. Or else '.env' is used.
         env_file_path = env_file_path or ".env"
-        _config: dict = dotenv_values(env_file_path)
+        _config: dict = {
+            **dotenv_values(".env.shared"),  # load shared development variables
+            **dotenv_values(".env.secret"),  # load sensitive variables
+            **dotenv_values(env_file_path)  # override GitHub Actions
+        }
 
         self.prediction_api: str = _config.get("DEFAULT_PREDICTION_API")
         print(f"\t[INFO]\tAI backend: `{self.prediction_api}`.")