add custom markers

main.py

@@ -1,10 +1,13 @@
 import io
+import os
+import matplotlib
 from typing import Literal
 import itertools
 import logging
 import random
 
 import matplotlib.pyplot as plt
+import matplotlib.font_manager as font_manager
 import numpy as np
 import uvicorn
 from fastapi import FastAPI
@@ -81,7 +84,6 @@ marker_subs = {
     "♣": "$♣$",
     "♥": "$♥$",
     "♦": "$♦$",
-    "🥑": "$🥑$",
 }