changes of db config add .env file and rename of ex_formate.html to file_formate.html

app/config.py

@@ -1,11 +1,29 @@
 import os
+# project base url
+BASE_DIR = os.path.abspath(os.path.dirname(__file__))
 
 class Config:
-    
-    SQLALCHEMY_DATABASE_URI = "mysql+pymysql://root:root@localhost/comparisondb"
+    # secret key
+    SECRET_KEY = os.getenv("SECRET_KEY", "dev-secret-key")
+ 
+    # Database varibles 
+    DB_DIALECT = os.getenv("DB_DIALECT")
+    DB_DRIVER = os.getenv("DB_DRIVER")
+    DB_USER = os.getenv("DB_USER")
+    DB_PASSWORD = os.getenv("DB_PASSWORD")
+    DB_HOST = os.getenv("DB_HOST")
+    DB_PORT = os.getenv("DB_PORT")
+    DB_NAME = os.getenv("DB_NAME")
+    # database connection url
+    SQLALCHEMY_DATABASE_URI = (
+        f"{DB_DIALECT}+{DB_DRIVER}://"
+        f"{DB_USER}:{DB_PASSWORD}@"
+        f"{DB_HOST}:{DB_PORT}/"
+        f"{DB_NAME}"
+    )
 
     SQLALCHEMY_TRACK_MODIFICATIONS = False
-    SECRET_KEY = "secret123"
-
-    UPLOAD_FOLDER = "app/static/uploads/"
+    # uploads folder path
+    UPLOAD_FOLDER = os.path.join(BASE_DIR, "static", "uploads")
+    # file extension
     ALLOWED_EXTENSIONS = {"xlsx", "xls", "csv"}