update examples

examples/error/README.md

@@ -0,0 +1,6 @@
+# error
+
+This shows what a Lua error looks like to the user. Lua errors are the most
+common and the most critical so that is why they are shown to the user. Other,
+lesser errors, are only shown to the developer because of their different
+nature.

examples/error/www/index.lua

@@ -1,6 +1,10 @@
 local fes = require("fes")
 local site = fes.fes()
 
+site.copyright = fes.util.copyright("https://fsd.vxserver.dev", "fSD")
+
 This is what an error looks like
 
+site:h1("Hello, World!")
+
 return site