perf: make docker release 10 times faster (#5803)

* build: improve multistage docker build

* build: add dockerfile for ci

* build: add BuildDockerMultiplatform function in build.sh for ci

* ci: change build method

* build: add missing mod download command to the Dockerfile

* build: revert changes made ffmpeg installed

* build: use musl build for docker release

* ci: apply to dev version

* fix: don't login on pr

* fix: don't build_docker_with_aria2 on pr

---------

Co-authored-by: Andy Hsu <i@nn.ci>

entrypoint.sh

@@ -4,4 +4,8 @@ chown -R ${PUID}:${PGID} /opt/alist/
 
 umask ${UMASK}
 
-exec su-exec ${PUID}:${PGID} ./alist server --no-prefix
+if [ "$1" = "version" ]; then
+  ./alist version
+else
+  exec su-exec ${PUID}:${PGID} ./alist server --no-prefix
+fi