Support for uncached data loading

So you don't have to restart the server, you can add "cache_data": false option to config.json to not cache data.
Documented in CONFIG.md
I added a require_module function that either does or does not cache the data based on this configuration option.

Signed-off-by: deadvey <deadvey@deadvey.com>

src/functions.js

@@ -4,6 +4,19 @@ const config = require("../config.json")
 const fs = require('fs')
 const locale = require(`../locales/${config.locale}.json`)
 
+// This function requires a module without caching it
+// So the server doesn't need to be restarted, though this can slow it down a bit.
+// https://stackoverflow.com/a/16060619
+export function require_module(module) {
+    if (config.cache_data == false) {
+        delete require.cache[require.resolve(module)];
+        return require(module);
+    }
+    else {
+        return require(module);
+    }
+}
+
 // The configuration defines a date format using the date-fns (a datetime library) syntax 
 // eg "yyyy-MM-dd"
 // this converts unix time (an integer) into a string that is formatted according to config.js
@@ -86,6 +99,7 @@ export function escape_input(input) {
 }
 
 // Render comment content by replacing the >> int with a url link to that comment
+// Syntax: ">> postID-commentID"
 export function render_comment(comment_content) {
     return comment_content
             .replaceAll(/>> ([0-9]*)-([0-9]*)/g, "<a href='/comment/$1-$2'>>> $1-$2</a>")
@@ -95,9 +109,11 @@ export function render_comment(comment_content) {
             .replaceAll("\n", "<br/>")
 
 };
+
+// Renders a string into markdown using markdown-it library
 export function render_md(content) {
     const markdownit = require("markdown-it")
-    const md = markdownit({
+    const md = markdownit({ // this is just defining some options for markdown-it, should I add this to config.json?
         html: false,
         xhtmlOut: false,
         breaks: true,