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

.env

@@ -0,0 +1,31 @@
+# -----------------------------
+# Flask App Configuration
+# -----------------------------
+FLASK_ENV=development
+FLASK_DEBUG=True
+FLASK_HOST=127.0.0.1
+FLASK_PORT=5001
+
+# -----------------------------
+# Security
+# -----------------------------
+SECRET_KEY=change-this-to-strong-secret-key
+
+# -----------------------------
+# Database Configuration
+# -----------------------------
+DB_DIALECT=mysql
+DB_DRIVER=pymysql
+DB_HOST=127.0.0.1
+DB_PORT=3306
+DB_NAME=comparisondb
+DB_USER=root
+DB_PASSWORD=root
+
+# DATABASE_URL=mysql+pymysql://root:root@localhost/comparisondb
+
+
+
+
+
+