gopls/doc: add documentation for gopls with Atom

Change-Id: Ia2e8913c8ff8d7da3061344f2d4e98bab7b4fbd7
Reviewed-on: https://go-review.googlesource.com/c/tools/+/209097
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
diff --git a/gopls/doc/atom.md b/gopls/doc/atom.md
new file mode 100644
index 0000000..7af0289
--- /dev/null
+++ b/gopls/doc/atom.md
@@ -0,0 +1,7 @@
+# Atom
+
+Install the [`ide-gopls`] package.
+You will also need to install the [`atom-ide-ui`] package.
+
+[`ide-gopls`]: https://github.com/MordFustang21/ide-gopls
+[`atom-ide-ui`]: https://github.com/facebookarchive/atom-ide-ui
diff --git a/gopls/doc/user.md b/gopls/doc/user.md
index 3dd1713..93090e8 100644
--- a/gopls/doc/user.md
+++ b/gopls/doc/user.md
@@ -14,6 +14,7 @@
 * [Emacs](emacs.md)
 * [Acme](acme.md)
 * [Sublime Text](subl.md)
+* [Atom](atom.md)
 
 ## Installation