Update dockerfile to use poetry.

Dockerfile

@@ -1,21 +1,19 @@
-FROM python:3.8.10-slim
+FROM python:3.12.3-slim
 
 # install dependencies for mysqlclient
 # RUN apt-get update && apt-get -y upgrade && apt-get -y install python3-dev default-libmysqlclient-dev build-essential
 
-RUN pip install --upgrade pip
-
 WORKDIR /home
 
 COPY classes classes/
 COPY cogs cogs/
 COPY utilities utilities/
-COPY highscores.py highscores.py
+COPY main.py main.py
-COPY requirements.txt requirements.txt
+COPY pyproject.toml pyproject.toml
 
-RUN pip install -r requirements.txt
+RUN pip install --upgrade pip && pip install poetry && poetry export -f requirements.txt --output requirements.txt && pip install -r requirements.txt
 
 # remove build deps that aren't needed to run
 # RUN apt-get -y remove python3-dev build-essential && apt-get -y autoremove
 
-CMD ["python3", "./highscores.py"]
+CMD ["python3", "./main.py"]