Docker image with Nginx front-end for WordPress PHP-FPM image - Updated NGNIX config - includes updated expires headers, browser caching and Gzip enabled.

wordpress.conf

# WordPress single site rules.
# Designed to be included in any server {} block.

# This order might seem weird - this is attempted to match last if rules below fail.
# http://wiki.nginx.org/HttpCoreModule
location / {
    try_files $uri $uri/ /index.php?$args;
}

# Add trailing slash to */wp-admin requests.
rewrite /wp-admin$ $scheme://$host$uri/ permanent;

# Directives to send expires headers and turn off 404 error logging.
location ~* ^.+\.(eot|otf|woff|woff2|ttf|rss|atom|zip|tgz|gz|rar|bz2|doc|xls|exe|ppt|tar|mid|midi|wav|bmp|rtf)$ {
    access_log off; log_not_found off; expires max;
}

# Media: images, icons, video, audio send expires headers.
location ~* \.(?:jpg|jpeg|gif|png|ico|cur|gz|svg|svgz|mp4|ogg|ogv|webm)$ {
    expires 1M;
    access_log off;
    add_header Cache-Control "public";
}

# CSS and Javascript send expires headers.
location ~* \.(?:css|js)$ {
    expires 1y;
    access_log off;
    add_header Cache-Control "public";
}

# HTML send expires headers.
location ~* \.(html)$ {
    expires 7d;
    access_log off;
    add_header Cache-Control "public";
}

# Browser caching of static assets.
location ~* \.(jpg|jpeg|png|gif|ico|css|js|pdf)$ {
    expires 7d;
    add_header Cache-Control "public, no-transform";
}

# Enable Gzip compression in NGNIX.
gzip on;
gzip_disable "msie6";
gzip_static on;
gzip_vary on;
gzip_proxied any;
gzip_comp_level 6;
gzip_min_length 512;
gzip_buffers 16 8k;
gzip_http_version 1.1;

gzip_types text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/rss+xml text/javascript image/svg+xml font/truetype application/x-font-ttf text/x-component font/opentype application/vnd.ms-fontobject;

# Pass all .php files onto a php-fpm/php-fcgi server.
location ~ [^/]\.php(/|$) {

    # Setup var defaults
    set $no_cache "";

    # If non GET/HEAD, don't cache & mark user as uncacheable for 1 second via cookie
    if ($request_method !~ ^(GET|HEAD)$) {
        set $no_cache "1";
    }

    # Don't cache logged in users or commenters
    if ( $http_cookie ~* "comment_author_|wordpress_(?!test_cookie)|wp-postpass_|wp-settings-|wp-resetpass-|woocommerce_" ) {
        set $no_cache "1";
    }

    # Don't cache admin URLs
    if ($request_uri ~* "/(wp-admin/|wp-login.php)") {
        set $no_cache "1";
    }

    # Don't cache WooCommerce dynamic content
    if ($request_uri ~* "/store.*|/cart.*|/my-account.*|/checkout.*|/addons.*|/administrator.*|/resetpass.*|\?(add-to-cart|wc-api|wc-ajax=get_refreshed_fragments)=") {
        set $no_cache "1";
    }

    # Drop no cache cookie if need be
    # (for some reason, add_header fails if included in prior if-block)
    if ($no_cache = "1") {
        add_header Set-Cookie "_mcnc=1; Max-Age=2; Path=/";
        add_header X-Microcachable "0";
    }

    # Bypass cache if no-cache cookie is set
    if ($http_cookie ~* "_mcnc") {
        set $no_cache "1";
    }

    # Bypass cache if flag is set
    fastcgi_no_cache $no_cache;
    fastcgi_cache_bypass $no_cache;

    fastcgi_cache microcache;
    fastcgi_cache_valid 404 30s;
    fastcgi_cache_valid 200 10s;
    fastcgi_max_temp_file_size 1M;

    #Use stale cache items while updating in the background
    fastcgi_cache_use_stale updating error timeout invalid_header http_500;
    fastcgi_cache_lock on;
    fastcgi_cache_lock_timeout 10s;

    fastcgi_read_timeout 300;
    fastcgi_buffers 8 256k;
    fastcgi_buffer_size 128k;
    fastcgi_intercept_errors on;
            
    fastcgi_split_path_info ^(.+?\.php)(/.*)$;
    if (!-f $document_root$fastcgi_script_name) {
        return 404;
    }
    # This is a robust solution for path info security issue and works with "cgi.fix_pathinfo = 1" in /etc/php.ini (default)

    if ($no_cache == "") {
        add_header X-Nginx-Cache $upstream_cache_status;
    }

    # Ignore headers set by WordPress
    fastcgi_ignore_headers Cache-Control Expires;
    
    include fastcgi_params;
    fastcgi_index index.php;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param PHP_VALUE "upload_max_filesize=64m
post_max_size=64m";
    fastcgi_pass wordpress:9000;
}