Adding more docs, archiving the first version of the script, changing the second version to be the main version, Python 3.12→3.13, updating the Dockerfile to support the main version of the script, updating README.md to reflect the most recent --help

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.12-slim-bookworm
+FROM python:3.13-slim-trixie
 
 VOLUME /home
 
@@ -6,8 +6,18 @@ COPY video_to_gif.py /home/video_to_gif.py
 
 WORKDIR /home
 
+# https://stackoverflow.com/a/52445962
 RUN apt update -y && \
     apt upgrade -y && \
-    apt install ffmpeg -y
+    apt install ffmpeg -y && \
+    apt install curl -y && \
+    apt install build-essential -y
+
+# https://stackoverflow.com/a/49676568
+RUN curl https://sh.rustup.rs -sSf | bash -s -- -y
+ENV PATH="/root/.cargo/bin:${PATH}"
+
+# https://crates.io/crates/gifski
+RUN cargo install gifski
 
 ENTRYPOINT ["python", "video_to_gif.py"]