Default to gold color if there is no color passed in for embes

app/dragon-bot.py

@@ -79,6 +79,9 @@ async def on_message(message):
         if not embed_description and embed_url:
             embed_description="[Direct Link]({})".format(embed_url)
 
+        if not embed_color:
+            embed_color=discord.Color.gold()
+
         embed = discord.Embed(
             title=embed_title,
             description=embed_description,