Added HikariCP as connection pool manager for efficient database connection management.

src/main/kotlin/net/ipksindia/dao/DatabaseFactory.kt

@@ -0,0 +1,25 @@
+package net.ipksindia.dao
+
+import com.zaxxer.hikari.HikariConfig
+import com.zaxxer.hikari.HikariDataSource
+import net.ipksindia.config.AppConfig
+import java.sql.Connection
+
+class DatabaseFactory private constructor() {
+    private val dataSource: HikariDataSource
+
+    init {
+        val config = HikariConfig()
+        config.jdbcUrl = AppConfig.databaseConfig.url
+        config.username = AppConfig.databaseConfig.user
+        config.password = AppConfig.databaseConfig.password
+        config.maximumPoolSize = 5
+        dataSource = HikariDataSource(config)
+    }
+
+    fun getConnection(): Connection = dataSource.connection
+
+    companion object {
+        val instance = DatabaseFactory()
+    }
+}