During export, you can include the content of another file. For example, to include your ‘.emacs’ file, you could use:
#+INCLUDE: "~/.emacs" src emacs-lisp
The first parameter is the file name to include. The optional second parameter specifies the block type: ‘example’, ‘export’ or ‘src’. The optional third parameter specifies the source code language to use for formatting the contents. This is relevant to both ‘export’ and ‘src’ block types.
You can visit the included file with C-c '.