clean up the node scripts a bit

node/blog.js

@@ -2,15 +2,7 @@ const {
     JSDOM
 } = require("jsdom");
 const fs = require("fs");
-
-const showdown = require("showdown");
-require("./showdown-prettify");
-require("./showdown-footnotes");
-const converter = new showdown.Converter({
-    parseImgDimensions: true,
-    headerLevelStart: 2,
-    extensions: ["prettify", "footnotes"]
-});
+const converter = require("./showdown")(2);
 
 module.exports = function () {
     let folder = __dirname + "/../";

node/rss.js

@@ -2,14 +2,7 @@ const {
     Feed
 } = require("feed");
 const fs = require("fs");
-
-const showdown = require("showdown");
-require("./showdown-prettify");
-require("./showdown-footnotes");
-const converter = new showdown.Converter({
-    parseImgDimensions: true,
-    extensions: ["prettify", "footnotes"]
-});
+const converter = require("./showdown")(1);
 
 module.exports = function () {
     let folder = __dirname + "/../";

node/showdown.js

@@ -0,0 +1,10 @@
+const showdown = require("showdown");
+require("./lib/showdown-prettify");
+require("./lib/showdown-footnotes");
+module.exports = function (headerLevel) {
+    return new showdown.Converter({
+        parseImgDimensions: true,
+        headerLevelStart: headerLevel,
+        extensions: ["prettify", "footnotes"]
+    });
+}