YAML importat Concepts

 

Mapping List values 

• Our CI CD Pipeline for Git
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• These double curly braces along with the dollar.
• This is a format specific to the GitHub actions. 
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• What they are trying to do is, they're trying to refer to and map with the name matrix (define above)
• And inside this they're trying to look for the node version element.
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  • And all node-version values is going to be mentioned in this placeholder value.

 

 

Map Key Value reference

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• Here  nginx_pacakge is try to refer a variable with same name
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• As above we can see above, there is a key with the value as nginx
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• So instead of duplicating these nginx value at multiple times,  they are trying to refer to this key with the help of this format, which is double curly brace.
• Same as above but without $ sign