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Merge pull request #2133 from sudo-bmitch/pr-from-glossary-ref 

Adjusting glossary reference and clarrifying the start of a Dockerfile
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Sebastiaan van Stijn 2019-10-15 12:00:25 +02:00 committed by GitHub
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10
docs/reference/builder.md
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@ -157,10 +157,12 @@ be UPPERCASE to distinguish them from arguments more easily.
Docker runs instructions in a `Dockerfile` in order. A `Dockerfile` **must
start with a \`FROM\` instruction**. The `FROM` instruction specifies the [*Base
Image*](glossary.md#base-image) from which you are building. `FROM` may only be
preceded by one or more `ARG` instructions, which declare arguments that are used
in `FROM` lines in the `Dockerfile`.
begin with a \`FROM\` instruction**. This may be after [parser
directives](#parser-directives), [comments](#format), and globally scoped
[ARGs](#arg). The `FROM` instruction specifies the [*Parent
Image*](glossary.md#parent-image) from which you are building. `FROM`
may only be preceded by one or more `ARG` instructions, which declare arguments
that are used in `FROM` lines in the `Dockerfile`.
Docker treats lines that *begin* with `#` as a comment, unless the line is
a valid [parser directive](#parser-directives). A `#` marker anywhere