feat: initial commit for oil price scraper service

FastAPI-based scraper for commodity ticker prices (HO, CL, RB futures)
and competitor oil pricing from NewEnglandOil. Includes cron-driven
scraping, PostgreSQL storage, and REST endpoints for price retrieval.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/config.py

@@ -0,0 +1,111 @@
+"""
+Configuration settings for eamco_scraper.
+
+This module provides configuration with environment-based switching:
+- LOCAL: Uses 'eamco' database, localhost CORS origins
+- PRODUCTION: Uses 'auburnoil' database, production domain CORS origins
+
+Environment variables are loaded from .env.local or .env.prod depending
+on the Docker compose file used.
+"""
+
+import logging
+import os
+from typing import List
+
+from dotenv import load_dotenv
+
+# Load environment variables from .env file if present
+load_dotenv()
+
+# =============================================================================
+# ENVIRONMENT MODE
+# =============================================================================
+
+MODE = os.getenv("MODE", "LOCAL")
+CURRENT_SETTINGS = os.getenv("CURRENT_SETTINGS", "DEVELOPMENT")
+
+# Log configuration mode (logger setup happens after config is loaded)
+_config_mode_msg = f"Using {'PRODUCTION' if CURRENT_SETTINGS == 'PRODUCTION' else 'DEVELOPMENT'} configuration"
+
+# =============================================================================
+# DATABASE CONFIGURATION
+# =============================================================================
+
+# Database connection components (can be overridden individually)
+POSTGRES_USERNAME = os.getenv("POSTGRES_USERNAME", "postgres")
+POSTGRES_PW = os.getenv("POSTGRES_PW", "password")
+POSTGRES_SERVER = os.getenv("POSTGRES_SERVER", "192.168.1.204")
+POSTGRES_PORT = os.getenv("POSTGRES_PORT", "5432")
+
+# Database name differs by environment
+if CURRENT_SETTINGS == "PRODUCTION":
+    POSTGRES_DBNAME = os.getenv("POSTGRES_DBNAME", "auburnoil")
+else:
+    POSTGRES_DBNAME = os.getenv("POSTGRES_DBNAME", "eamco")
+
+# Build connection URI from components (fallback)
+_DEFAULT_DATABASE_URI = "postgresql+psycopg2://{}:{}@{}:{}/{}".format(
+    POSTGRES_USERNAME,
+    POSTGRES_PW,
+    POSTGRES_SERVER,
+    POSTGRES_PORT,
+    POSTGRES_DBNAME
+)
+
+# Allow full DATABASE_URL override
+DATABASE_URL: str = os.getenv("DATABASE_URL", _DEFAULT_DATABASE_URI)
+
+# SQLAlchemy binds (for compatibility)
+SQLALCHEMY_DATABASE_URI = DATABASE_URL
+SQLALCHEMY_BINDS = {POSTGRES_DBNAME: SQLALCHEMY_DATABASE_URI}
+
+# =============================================================================
+# CORS CONFIGURATION
+# =============================================================================
+
+# Parse CORS origins from environment (comma-separated) or use defaults
+_cors_env = os.getenv("CORS_ORIGINS", "")
+
+if _cors_env:
+    CORS_ORIGINS: List[str] = [origin.strip() for origin in _cors_env.split(",")]
+elif CURRENT_SETTINGS == "PRODUCTION":
+    # Production CORS origins
+    CORS_ORIGINS = [
+        "https://oil.edwineames.com",
+        "https://edwineames.com",
+    ]
+else:
+    # Development CORS origins
+    CORS_ORIGINS = [
+        "http://localhost:9000",
+        "https://localhost:9513",
+        "http://localhost:9514",
+        "http://localhost:9512",
+        "http://localhost:9511",
+        "http://localhost:5173",  # Frontend port
+        "http://localhost:9616",  # Authorize service port
+    ]
+
+# =============================================================================
+# SCRAPER CONFIGURATION
+# =============================================================================
+
+# User agent for web scraping (identifies your application)
+SCRAPER_USER_AGENT: str = "Unraid-EamcoScraper/1.0 (eeames214@gmail.com)"
+
+# Rate limiting: Sleep between requests (be respectful to target servers)
+SCRAPER_DELAY_SECONDS: float = float(os.getenv("SCRAPER_DELAY", "2.0"))
+
+# Request timeout in seconds
+SCRAPER_TIMEOUT: int = int(os.getenv("SCRAPER_TIMEOUT", "10"))
+
+# Target URL for New England Oil Zone 10
+NEWENGLAND_OIL_ZONE10_URL: str = "https://www.newenglandoil.com/massachusetts/zone10.asp?x=0"
+
+# =============================================================================
+# LOGGING CONFIGURATION
+# =============================================================================
+
+LOG_LEVEL: str = os.getenv("LOG_LEVEL", "INFO")
+LOG_FORMAT: str = "%(asctime)s - %(name)s - %(levelname)s - %(message)s"