Fixed config

- config didn't work now it's working properly
- it takes config from envirionment variable FLASK_CONFIG
- if no such variable exists it uses Development config as default

app/routes.py

@@ -0,0 +1,7 @@
+from flask import render_template
+
+from . import app
+
+@app.route("/", methods=["GET"])
+def index():
+    return render_template("pages/index.html")