added index page

main.py

-from flask import Flask, abort, request
+from flask import Flask, abort, request, render_template
 from auth import auth_facebook, auth_slack
 from config import *
@@ -6,6 +6,10 @@ from message import *
 app = Flask(__name__)
+@app.route('/')
+def index():
+	return render_template('index.html')
+
 @app.route('/callback/xE4sA', methods=['GET', 'POST'])
 def callback():
@@ -23,7 +27,6 @@ def callback():
 slack = auth_slack()
-# facebook = auth_facebook()
 if __name__ == '__main__':
 	app.run(host="0.0.0.0", port=5000)