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Add some more specific help for Dockerfile build contexts. 

I've copy and pasted the error message so its googlable.

Docker-DCO-1.1-Signed-off-by: SvenDowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
This commit is contained in:
SvenDowideit 2014-05-13 13:38:11 +10:00 committed by Tibor Vass
parent a8f2402b87
commit 6a55530c56
1 changed files with 9 additions and 1 deletions
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10
docs/sources/reference/commandline/cli.md
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@ -201,7 +201,8 @@ and a "context".
The files at `PATH` or `URL` are called the "context" of the build. The build
process may refer to any of the files in the context, for example when using an
[*ADD*](/reference/builder/#dockerfile-add) instruction. When a single Dockerfile is
given as `URL`, then no context is set.
given as `URL` or is piped through STDIN (`docker build - < Dockerfile`), then
no context is set.
When a Git repository is set as `URL`, then the
repository is used as the context. The Git repository is cloned with its
@ -283,6 +284,13 @@ repository is used as Dockerfile. Note that you
can specify an arbitrary Git repository by using the `git://`
schema.
> **Note:** `docker build` will return a `no such file or directory` error
> if the file or directory does not exist in the uploaded context. This may
> happen if there is no context, or if you specify a file that is elsewhere
> on the Host system. The context is limited to the current directory (and its
> children) for security reasons, and to ensure repeatable builds on remote
> Docker hosts. This is also the reason why `ADD ../file` will not work.
## commit
Create a new image from a container᾿s changes