added js version of problem 1

1/euler001.js

@@ -0,0 +1,8 @@
+#!/usr/bin/node
+
+console.log(
+    [...Array(999).keys()]
+        .filter( x => (x+1) % 3 == 0 || (x+1) % 5 == 0)
+        .reduce( (sum, x) => sum + x + 1)
+    + 1
+);