A bunch of stuff, including outsourcing globs to the shell, positional input argument, more consistent edocs, and better Docker handling

Dockerfile

@@ -1,11 +1,13 @@
 FROM python:3.12-slim-bookworm
 
-WORKDIR /app
+VOLUME /home
 
-COPY video_to_gif.py /app/video_to_gif.py
+COPY video_to_gif.py /home/video_to_gif.py
 
-RUN apt update && \
-    apt upgrade && \
+WORKDIR /home
+
+RUN apt update -y && \
+    apt upgrade -y && \
     apt install ffmpeg -y
 
 ENTRYPOINT ["python", "video_to_gif.py"]