Method not allowed, app running with no errors in heroku logs - python-3.x

Question

I've deployed my flask app on heroku, and i'm getting "Method not allowed" in my browser at the url.
all my routes have the methods set. I'm not trying to do much other than access my pages (no forms or anything like that). I'm using gunicorn. Just got no idea where I'm going wrong.
here is my main file:
from mongo import get_spotify_music
import os
app = Flask(__name__)
music = list(get_spotify_music())
#app.route("/", methods=['GET'])
#app.route("/index", methods=['GET'])
def home():
return render_template('index.html', title='about')
is_live = os.environ.get("IS_LIVE", None)
url = '0.0.0.0' if is_live else '127.0.0.1'
if __name__ == "__main__":
port = int(os.environ.get("PORT", 5000))
app.run(host=url, port=port, debug=True)```
my Procfile looks like:
```web: gunicorn app:app```
heroku logs --tail looks like:
```2019-07-15T08:25:41.093957+00:00 app[api]: Deploy 325e5224 by user myemail#myemail.com
2019-07-15T08:25:45.035819+00:00 heroku[web.1]: Starting process with command `gunicorn app:app`
2019-07-15T08:25:47.166897+00:00 app[web.1]: [2019-07-15 08:25:47 +0000] [4] [INFO] Starting gunicorn 19.9.0
2019-07-15T08:25:47.167484+00:00 app[web.1]: [2019-07-15 08:25:47 +0000] [4] [INFO] Listening at: http://0.0.0.0:57502 (4)
2019-07-15T08:25:47.167616+00:00 app[web.1]: [2019-07-15 08:25:47 +0000] [4] [INFO] Using worker: sync
2019-07-15T08:25:47.172768+00:00 app[web.1]: [2019-07-15 08:25:47 +0000] [10] [INFO] Booting worker with pid: 10
2019-07-15T08:25:47.261871+00:00 app[web.1]: [2019-07-15 08:25:47 +0000] [11] [INFO] Booting worker with pid: 11
2019-07-15T08:25:47.852647+00:00 heroku[web.1]: State changed from starting to up
2019-07-15T08:25:50.000000+00:00 app[api]: Build succeeded
When I go to the link that's set, i just get a method not allowed, rather than my web page....
Not sure where I'm going wrong here...