Add screenshot

README.md

@@ -6,12 +6,8 @@ including pretty icons,
 and your apps will show up under the same top URL,
 like they all work together somehow.
 
-There are lots of other things like this around.
+![Screen Shot](docs/screenshot.png)
-Probably the shiniest is called "Heimdall".
+
-I made this one because I didn't want to run yet another database
-or a PHP server
-when I am perfectly happy editing a JSON file
-and having my browser do all the work.
 
 # portal.json
 
@@ -43,6 +39,7 @@ Some notes:
 * `"target": "_blank"` will cause clicks to open in a new tab
 * `"app": "stat"` makes the icon be the built-in CPU stats pie chart
 
+
 # Other uses for this
 
 Since the portal stuff is all static files,
@@ -50,3 +47,20 @@ you could just not use any of that,
 and instead use this as a service to provide CPU stats.
 Just open `/stats.html` instead of `/`.
 Or write your own ECMAScript code that imports `stat.mjs`.
+
+
+# Alternatives
+
+There are lots of other things like this around.
+Probably the shiniest is called "Heimdall".
+
+I made this one because I didn't want to run yet another database
+or a PHP server
+when I am perfectly happy editing a JSON file
+and having my browser do all the work.
+
+Because this runs so much in the browser,
+no resources are used when no users are active,
+and when there are users,
+it's still very light:
+less than 1% CPU on my Raspberry Pi.