To send an email directly from Golang you can use the package smtp which implements the Simple Mail Transfer Protocol (SMTP) as defined in RFC 5321. You also need a mail server, for this tutorial will use the Gmail mail server.

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Nginx is one of the most popular web servers in the world. It is also known to be more resource-friendly than Apache in most cases and can be used as a web server or as a reverse proxy.

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A robots.txt file tells search engine crawlers which pages or files the crawler can or can't request from your site. This is used mainly to avoid overloading your site with requests; it is not a mechanism for keeping a web page out of Google. To keep a web page out of Google, you should use noindex directives, or to password-protect your page.

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For a long submit operation or to avoid users clicking twice a submit button, a common solution is to disable the submit button after user clicked on it.

To disable a button using jQuery you need to add the disabled attribute to the button as true.

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How to build a LAMP stack (Linux, Apache, MySQL, PHP) on CentOS 7. The article includes the install + the firewall settings for public access.

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How to generate entities from tables using EclipseLink. Simple example using one-to-one database relationship. @MappedSuperclass example included

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