Update package index (#650)

Closes #622

services/download/Dockerfile

@@ -1,6 +1,6 @@
-FROM bash:alpine3.15
+FROM bash:alpine3.19
 
-RUN apk add parallel aria2
+RUN apk update && apk add parallel aria2
 COPY . /docker
 RUN chmod +x /docker/download.sh
 ENTRYPOINT ["/docker/download.sh"]