Need to install specific poetry version, export gets removed in v2.

Dockerfile

@@ -14,6 +14,6 @@ COPY classes classes/
 COPY cogs cogs/
 COPY database_setup database_setup/
 
-RUN pip install --upgrade pip && pip install poetry && poetry export -f requirements.txt --output requirements.txt && pip install -r requirements.txt
+RUN pip install --upgrade pip && pip install poetry==1.8.3 && poetry export -f requirements.txt --output requirements.txt && pip install -r requirements.txt
 
 CMD ["python3", "-u", "./main.py"]