Fix bug involving attachments

src/bot_core.py

@@ -57,6 +57,7 @@ async def on_reaction_add(react: discord.Reaction, user: discord.User):
     message: discord.Message = react.message
     reaction: discord.Reaction = react.emoji
     link: str = react.message.jump_url
+    if len(react.message.attachments) > 0:
         image: str = react.message.attachments[0].url
 
     react_uid: int = react.emoji.id
@@ -83,6 +84,7 @@ async def on_reaction_add(react: discord.Reaction, user: discord.User):
                       timestamp=datetime.datetime.now())
 
         embed.set_author(name=f"{react.message.author}")
+        if len(react.message.attachments) > 0:
             embed.set_image(url=image)
 
         posting_channel: discord.TextChannel = await client.fetch_channel(args.channel_id)