Step by step guide: use http-server instead of python

public/docs/js/latest/guide/setup.jade

@@ -12,10 +12,18 @@
     You can edit and test out your apps by serving local files with a web server. Follow the steps in the <a href="../quickstart.html">quickstart</a> to get Typescript setup.
 
   p.
-    When you're serving local files, edit and save them and start a web server that serves files in that directory.  If you have Python installed, you can run a basic HTTP server from the root of your code directory with:
+    If you don't already have an HTTP server,
+    you can install one using <code>npm install -g http-server</code>.
+    (If that results in an access error, then you might need to use
+    <code><b>sudo</b> npm ...</code>.)
 
-  pre.prettyprint.lang-bash
-    code python -m SimpleHTTPServer 8000
+  p For example:
+
+  code-example.
+    # From the directory that contains index.html:
+    npm install -g http-server  # Or sudo npm install -g http-server
+    http-server                 # Creates a server at localhost:8080
+    # In a browser, visit localhost:8080/index.html
 
 .callout.is-helpful
   header Typescript vs ES5

public/docs/js/latest/guide/setupAlt.jade

@@ -12,10 +12,16 @@ include ../../../../_includes/_util-fns
 
     You can edit and test out your apps by serving local files with a web server. Follow the steps in the <a href="../quickstart.html">quickstart</a> to get Typescript setup.
 
-    When you're serving local files, edit and save them and start a web server that serves files in that directory.  If you have Python installed, you can run a basic HTTP server from the root of your code directory with:
+    If you don't already have an HTTP server, you can install one using <code>npm install -g http-server</code>. (If that results in an access error, then you might need to use <code><b>sudo</b> npm ...</code>.)
+
+    For example:
 
   pre.prettyprint.lang-bash
-    code python -m SimpleHTTPServer 8000
+    code.
+      # From the directory that contains index.html:
+      npm install -g http-server  # Or sudo npm install -g http-server
+      http-server                 # Creates a server at localhost:8080
+      # In a browser, visit localhost:8080/index.html
 
 .callout.is-helpful
   header Typescript vs ES5

public/docs/js/latest/quickstart.jade

@@ -245,8 +245,9 @@
     If you don't already have an HTTP server,
     you can install one using <code>npm install -g http-server</code>.
     (If that results in an access error, then you might need to use
-    <code><b>sudo</b> npm ...</code>)
-    For example:
+    <code><b>sudo</b> npm ...</code>.)
+
+  p For example:
 
   code-example.
     # From the directory that contains index.html: