Bump streamlink to 7.1.3; Improve Dockerfile

Group things together and don't make multiple RUN commands to reduce the number of layers.

Author: mkody

Dockerfile

@@ -1,23 +1,19 @@
 FROM python:3.13.2-alpine3.21
 
-RUN apk add --no-cache tini~=0.19.0
-
-RUN apk add --no-cache ffmpeg~=6.1
-
-RUN python -m pip install --no-cache-dir --upgrade streamlink==7.1.2
+ARG UNAME=user
+ARG UID=1000
+ARG GID=1000
 
+COPY entrypoint.sh /
 COPY twitch-recorder.py /opt/
 
-COPY entrypoint.sh /
-RUN chmod 755 /entrypoint.sh
+RUN apk add --no-cache ffmpeg~=6.1 tini~=0.19.0 && \
+    python -m pip install --no-cache-dir --upgrade streamlink==7.1.3 && \
+    chmod 755 /entrypoint.sh && \
+    addgroup -g "$GID" "$UNAME" && \
+    adduser -D -u "$UID" -G "$UNAME" -s /bin/bash "$UNAME" && \
+    chown -R "$UID:$GID" /opt
 
-ARG UNAME=user
-ARG UID=1000
-ARG GID=1000
-RUN addgroup -g $GID $UNAME
-RUN adduser -D -u $UID -G $UNAME -s /bin/bash $UNAME
-RUN chown -R $UID:$GID /opt
 USER $UNAME
-
 ENTRYPOINT ["/entrypoint.sh"]
 CMD ["/sbin/tini", "--", "python", "/opt/twitch-recorder.py"]