create custom page template wordpress

1/*           make this file in template-parts folder 
2                 give file name as category_post.php        */
3
4<?php
5/**
6 * Template Name: Category Custom Page
7 */
8 
9get_header(); ?>
10 
11<div id="primary" class="content-area">
12    <main id="main" class="site-main" role="main">
13 
14    <?php
15    $args = array(
16        'post_type' => 'post',
17        'post_status' => 'publish',
18        'category_name' => 'wordpress',
19        'posts_per_page' => 5,
20    );
21    $arr_posts = new WP_Query( $args );
22 
23    if ( $arr_posts->have_posts() ) :
24 
25        while ( $arr_posts->have_posts() ) :
26            $arr_posts->the_post();
27            ?>
28            <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
29                <?php
30                if ( has_post_thumbnail() ) :
31                    the_post_thumbnail();
32                endif;
33                ?>
34                <header class="entry-header">
35                    <h1 class="entry-title"><?php the_title(); ?></h1>
36                </header>
37                <div class="entry-content">
38                    <?php the_excerpt(); ?>
39                    <a href="<?php the_permalink(); ?>">Read More</a>
40                </div>
41            </article>
42            <?php
43        endwhile;
44        wp_pagenavi(
45            array(
46                'query' => $arr_posts,
47            )
48        );
49    endif;
50    ?>
51 
52    </main><!-- .site-main -->
53</div><!-- .content-area -->
54 
55<?php get_footer(); ?>