doc: README manual installation (#51)

- Add installing `simple-httpd`
  I had an error loading org-roam-ui (on Emacs 27.2 vanilla)

- Remove `(require 'webisocket)
  Redundant; it's required at the top of org-roam-ui)

I confirm that this works on my end -- Emacs 27.2 vanilla on Windows.
Thank you.

1 files changed, 2 insertions, 2 deletions

diff --git a/README.md b/README.md
index 159f90e..103158b 100644
--- a/README.md
+++ b/README.md
@@ -17,10 +17,11 @@ org-roam-ui requires `org-roam`, `websocket`, `simple-httpd`, `f` and Emacs >= 2
 
 ### Manually
 
-Install `websocket.el`
+Install `websocket.el` and `simple-httpd`
 
 ```emacs-lisp
 M-x package-install websocket
+M-x package-install simple-httpd
 ```
 
 Clone the repo:
@@ -33,7 +34,6 @@ git clone [email protected]:org-roam/org-roam-ui.git
 Load in Emacs (add to config):
 
 ```lisp
-(require 'websocket)
 (add-to-list 'load-path "~/.emacs.d/private/org-roam-ui")
 (load-library "org-roam-ui")
 ```