Doc update and SQL init

.env.example

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+# Database Configuration
+MYSQL_ROOT_PASSWORD=your_mysql_root_password_here
+DB_USER=ppr_user
+DB_PASSWORD=your_database_password_here
+DB_NAME=ppr
+DB_PORT=3306
+
+# API Configuration
+DB_HOST=db
+SECRET_KEY=your_secret_key_here_change_in_production
+ACCESS_TOKEN_EXPIRE_MINUTES=30
+API_V1_STR=/api/v1
+PROJECT_NAME=Airfield PPR API NextGen
+API_PORT_EXTERNAL=8001
+
+# Web Configuration
+WEB_PORT_EXTERNAL=8082
+
+# phpMyAdmin Configuration
+PMA_HOST=db
+UPLOAD_LIMIT=50M
+PMA_PORT_EXTERNAL=8083