add basic functionality mirrored from arthurbot

.devcontainer/Dockerfile

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+FROM python:slim
+WORKDIR /
+RUN apt-get -y update; apt-get -y upgrade
+RUN apt-get -y install git binutils xxd
+RUN apt-get -y install python3 python3-dev git python3-pip python-is-python3 libgl1-mesa-dev build-essential ffmpeg
+COPY requirements.txt .
+RUN pip install -r requirements.txt

.devcontainer/requirements.txt

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+discord
+PyNaCl
+pytube
+yt_dlp