introduce an ApplicationConfig module to manage the environment configs in one location

app/lib/application_configs.py

@@ -0,0 +1,11 @@
+import os
+from pydantic.dataclasses import dataclass
+
+@dataclass
+class ApplicationConfigs():
+    region_name         = os.environ.get('AWS_REGION', 'ca-central-1')
+    aws_access_key_id   = os.environ.get('AWS_ACCESS_KEY_ID', '')
+    aws_secret_key      = os.environ.get('AWS_SECRET_ACCESS_KEY', '')
+    sqs_queue           = os.environ.get('SQS_QUEUE', '')
+    endpoint_url        = os.environ.get('ENDPOINT_URL', '')
+    s3_processed_bucket = os.environ.get('S3_PROCESSED_BUCKET', 'measure-local-solver-processed')