Move HTML generation back to JavaScript.

- Functionality maintained
- File operations removed from server
- Browsers should again be able to cache the tutorial

WebHostLib/__init__.py

@@ -10,7 +10,6 @@ from flask import Flask, request, redirect, url_for, render_template, Response,
 from flask_caching import Cache
 from flaskext.autoversion import Autoversion
 from flask_compress import Compress
-import markdown
 
 from .models import *
 
@@ -76,14 +75,8 @@ def register_session():
 
 @app.route('/tutorial')
 @app.route('/tutorial/<string:lang>')
-@cache.memoize(timeout=300)  # update every 300 seconds
 def tutorial(lang='en'):
-    try:
-        md_file = open(os.path.join('WebHostLib', 'tutorial', f"tutorial_{lang}.md"), encoding="utf-8-sig")
-    except FileNotFoundError:
-        return render_template("tutorial.html", tutorial='The tutorial is not available in that language yet, sorry.')
-    else:
-        return render_template("tutorial.html", tutorial=markdown.markdown(md_file.read()))
+    return render_template(f"tutorial.html", lang=lang)
 
 
 @app.route('/seed/<suuid:seed>')