feat: add PUID, PGID, Umask settings to docker image (close #2525 pr #2818)

Co-authored-by: DDSRem <1448139087@qq.com>

Dockerfile

@@ -10,6 +10,8 @@ LABEL MAINTAINER="i@nn.ci"
 VOLUME /opt/alist/data/
 WORKDIR /opt/alist/
 COPY --from=builder /app/bin/alist ./
-RUN apk add ca-certificates
+COPY entrypoint.sh /entrypoint.sh
+RUN apk add ca-certificates bash su-exec
+ENV PUID=1000 PGID=1000 UMASK=022
 EXPOSE 5244
-CMD [ "./alist", "server", "--no-prefix" ]
+ENTRYPOINT [ "/entrypoint.sh" ]

entrypoint.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+chown -R ${PUID}:${PGID} /opt/alist/
+
+umask ${UMASK}
+
+exec su-exec ${PUID}:${PGID} ./alist server --no-prefix