Updated to WP 5.4, added nginx and msmtp

Dockerfile

 # NAME leenooks/wordpress
-# VERSION 5.1.1-fpm
+# VERSION 5.4-fpm
 
-FROM wordpress:5.1.1-fpm
+FROM wordpress:5.4-fpm
 
-RUN apt-get update && apt-get install -y openssh-server ssmtp && rm -rf /var/lib/apt/lists/* /tmp/* \
-	&& useradd -c "Hosting Admin User" -u 1000 -g users -G www-data -d /var/www/html -M lamp \
-	&& sed -i -e 's/^mailhub=mail$/mailhub=smtp/' -e "s/^hostname=/#hostname=/" -e 's/#FromLineOverride=YES/FromLineOverride=YES/' /etc/ssmtp/ssmtp.conf
+RUN apt-get update && apt-get install -y openssh-server msmtp nginx \
+	&& rm /etc/nginx/sites-enabled/default \
+	&& apt-get -y autoremove \
+	&& apt-get clean \
+	&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+RUN docker-php-ext-install -j$(nproc) opcache
+
+RUN useradd -c "Hosting Admin User" -u 1000 -g users -G www-data -d /var/www/html -M lamp
+RUN sed -e 's/^expose_php = On/expose_php = Off/' /usr/local/etc/php/php.ini-production > /usr/local/etc/php/php.ini
+COPY www.conf /usr/local/etc/php-fpm.d/
+COPY nginx-app.conf /etc/nginx/conf.d/
+COPY msmtprc /etc/
+RUN sed -i -e 's#^;sendmail_path =#sendmail_path = "/usr/bin/msmtp -t"#' /usr/local/etc/php/php.ini
 
 COPY sshd_config.patch /tmp
 RUN (cd / && patch -p0 ) < /tmp/sshd_config.patch && rm /tmp/sshd_config.patch
@@ -15,5 +26,3 @@ EXPOSE 9000/tcp 22/tcp
 COPY init /sbin
 ENTRYPOINT [ "/sbin/init" ]
 CMD [ "php-fpm" ]
-
-RUN docker-php-ext-install -j$(nproc) opcache

init

 #!/bin/sh
 
-if [  -x /usr/sbin/sshd -a "${SSH_START}" = "TRUE" ]; then
+NO_NGINX=${NO_NGINX:-TRUE}
+SSH_START=${SSH_START:-FALSE}
+
+function nginx_start() {
+	# Start NGINX
+	if [ -x /usr/sbin/nginx -a "${NO_NGINX}" != "TRUE" ]; then
+		echo "* Starting NGINX..."
+		start-stop-daemon --start --pidfile /var/run/nginx.pid --exec /usr/sbin/nginx -- -g 'daemon on; master_process on;'
+	fi
+}
+
+if [ -x /usr/sbin/sshd -a "${SSH_START}" = "TRUE" ]; then
 	[ ! -d /var/run/sshd ] && mkdir /var/run/sshd
 	start-stop-daemon --start --pidfile /var/run/sshd.pid --exec /usr/sbin/sshd -- -p 22
 fi
 
+nginx_start
+
 exec /usr/local/bin/docker-entrypoint.sh "$@"

msmtprc

+# A system wide configuration file is optional.
+# If it exists, it usually defines a default account.
+# This allows msmtp to be used like /usr/sbin/sendmail.
+account default
+
+# The SMTP smarthost
+host smtp
+
+# Envelope-from address
+#from user@example.com
+domain example.com
+
+# Construct envelope-from addresses of the form "user@oursite.example"
+#auto_from on
+#maildomain example.com
+
+# Syslog logging with facility LOG_MAIL instead of the default LOG_USER
+syslog LOG_MAIL

nginx-app.conf

+server {
+	listen			80 default_server;
+	listen			[::]:80 default_server;
+
+	access_log		none;
+	client_max_body_size	10m;
+	error_log		none;
+	fastcgi_buffers		16 16k;
+	fastcgi_buffer_size	16k;
+	index			index.php index.html;
+	root			/var/www/html/public;
+	server_tokens		off;
+
+	set $my_https "off";
+	if ($http_x_forwarded_proto = "https") {
+		set $my_https "on";
+	}
+
+	location / {
+		try_files $uri $uri/ /index.php?$query_string;
+	}
+
+	location ~ \.php$ {
+		try_files $uri =404;
+		fastcgi_split_path_info ^(.+\.php)(/.+)$;
+		fastcgi_pass 127.0.0.1:9000;
+		fastcgi_index index.php;
+		include fastcgi_params;
+		fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+		fastcgi_param SERVER_NAME $host;
+		fastcgi_param PATH_INFO $fastcgi_path_info;
+		fastcgi_param HTTPS $my_https;
+		fastcgi_param PHP_ADMIN_VALUE "sendmail_path=/usr/sbin/sendmail -i -t";
+	}
+}

www.conf

+[www]
+group = www-data
+listen = 127.0.0.1:9000
+pm = dynamic
+pm.max_children = 25
+pm.max_spare_servers = 10
+pm.min_spare_servers = 5
+pm.start_servers = 10
+user = www-data