optimized kwalyon's container building

Dockerfile

@@ -1,16 +1,24 @@
-FROM python:latest
+FROM python:latest AS build-image
+
+RUN apt update && apt install -y libblas-dev liblapack-dev
 
 RUN python -m pip install --upgrade pip
 
-RUN pip install pandas
-RUN pip install nltk
-RUN python -m nltk.downloader -d /usr/local/share/nltk_data all
-RUN pip install python-dotenv
+RUN python -m venv /root/venv
+ENV PATH="/root/venv/bin:$PATH"
 
-RUN pip install nextcord
+COPY ./requirements.txt ./requirements.txt
+RUN --mount=type=cache,mode=0755,target=/root/.cache/pip pip install -r ./requirements.txt
 
-RUN pip install beautifulsoup4 requests lxml
 
-WORKDIR /usr/app/src
+FROM python:slim
 
-CMD [ "python", "main.py" ]
+RUN apt update && apt install -y libblas-dev liblapack-dev
+
+COPY --from=build-image /root/venv /root/venv
+ENV PATH="/root/venv/bin:$PATH"
+
+RUN python -m nltk.downloader words
+
+WORKDIR /usr/app
+CMD [ "python", "./src/main.py" ]