make the download form the top-level doc

app/routes.py

@@ -3,12 +3,7 @@ from app import app
 from app.forms import DownloadForm
 from datetime import datetime, timedelta
 
-@app.route('/')
-@app.route('/index')
-def index():
-    return render_template('index.html')
-
-@app.route('/download', methods=['GET', 'POST'])
+@app.route('/', methods=['GET', 'POST'])
 def download():
     form = DownloadForm()
     if form.validate_on_submit():

app/templates/index.html

@@ -1,5 +0,0 @@
-{% extends "base.html" %}
-
-{% block app_content %}
-    <h1>Hello!</h1>
-{% endblock %}