05/31 Phase 1: initial codes

app/config.py

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+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+class Config:
+    SECRET_KEY = os.environ.get('SECRET_KEY', 'dev-secret-change-me')
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+    WTF_CSRF_ENABLED = True
+
+    DATABASE_URL = os.environ.get('DATABASE_URL', '')
+    SQLALCHEMY_DATABASE_URI = DATABASE_URL
+
+    GROQ_API_KEY = os.environ.get('GROQ_API_KEY', '')
+    GROQ_MODEL = os.environ.get('GROQ_MODEL', 'llama-3.3-70b-versatile')
+
+    UPLOAD_FOLDER = os.environ.get('UPLOAD_FOLDER', '/home/pfm/app/uploads')
+    MAX_CONTENT_LENGTH = int(os.environ.get('MAX_CONTENT_LENGTH', 10485760))
+
+    APP_CURRENCY = os.environ.get('APP_CURRENCY', 'USD')
+    APP_CURRENCY_SYMBOL = os.environ.get('APP_CURRENCY_SYMBOL', '$')
+    APP_TIMEZONE = os.environ.get('APP_TIMEZONE', 'Asia/Ho_Chi_Minh')
+
+    ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'pdf'}
+
+
+class DevelopmentConfig(Config):
+    DEBUG = True
+    SQLALCHEMY_DATABASE_URI = os.environ.get(
+        'DATABASE_URL',
+        'mysql+pymysql://pfm_user:password@localhost/pfm_db'
+    )
+    SQLALCHEMY_ECHO = False  # set True to log SQL queries during dev
+
+
+class ProductionConfig(Config):
+    DEBUG = False
+    SQLALCHEMY_ECHO = False
+
+
+config = {
+    'development': DevelopmentConfig,
+    'production': ProductionConfig,
+    'default': DevelopmentConfig,
+}