Fix typo in builder reference
@@ -180,7 +180,7 @@ that will be excluded from the context. Globbing is done using Go's
> **Note**:
> The `.dockerignore` file can even be used to ignore the `Dockerfile` and
> `.dockerignore` files. This might be useful if you are copying files from
-> the root of the build context into your new containter but do not want to
+> the root of the build context into your new container but do not want to
> include the `Dockerfile` or `.dockerignore` files (e.g. `ADD . /someDir/`).
The following example shows the use of the `.dockerignore` file to exclude the
