Where to place postgres JDBC driver jar on tomcat

Hi, I have been getting an error in my java web application "No suitable driver found for jdbc:postgresql://...."

	private String getCustomersResults() throws SQLException {
		log.info("The customer results will be printed");
		String url = "jdbc:postgresql://10.233.1.40:5432/postgres";
		Properties props = new Properties();
		props.setProperty("user", "postgres");
		props.setProperty("password", "postgres");
		Connection conn = DriverManager.getConnection(url, props);
		Statement statement = conn.createStatement();
		
		
		log.info("select price from public.customer_rating");
		
		ResultSet rs = statement.executeQuery("select price from public.customer_rating");

		String price = "";
		while (rs.next()) {
			price = rs.getString("price");
		}
		log.info("The price is " + price);
		rs.close();
		conn.close();
		return price;
	}

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