Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. For example, "Now that we have all the code in place, let's build the Docker image using the Dockerfile file."

A block of code is set as follows:

// addInt.go 
 
package main 
 
func addInt(numbers ...int) int { 
    sum := 0 
    for _, num := range numbers { 
        sum += num 
    } 
    return sum 
} 

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

// addInt.go 
 
package main 
 
func addInt(numbers ...int) int { 
    sum := 0 
    for _, num := range numbers { 
        sum += num 
    } 
    return sum 
} 

Any command-line input or output is written as follows:

$ cd docker

Bold: Indicates a new term, an important word, or words that you see on the screen, for example, in menus or dialog boxes, also appear in the text like this. For example, "Select System info from the Administration panel."