chore: add way to set defualt file permission (#626)

* chore: add way to set file permission

* chore: add bililive-go home for docker image

Dockerfile

@@ -1,14 +1,18 @@
 FROM alpine
 
 ARG tag
+
+ENV WORKDIR="/srv/bililive"
 ENV OUTPUT_DIR="/srv/bililive" \
     CONF_DIR="/etc/bililive-go" \
     PORT=8080
 
+ENV PUID=0 PGID=0 UMASK=022
+
 RUN mkdir -p $OUTPUT_DIR && \
     mkdir -p $CONF_DIR && \
     apk update && \
-    apk --no-cache add ffmpeg libc6-compat curl tzdata && \
+    apk --no-cache add ffmpeg libc6-compat curl su-exec tzdata && \
     cp -r -f /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
 
 RUN sh -c "case $(arch) in aarch64) go_arch=arm64 ;; arm*) go_arch=arm ;; i386|i686) go_arch=386 ;; x86_64) go_arch=amd64;; esac && \
@@ -21,9 +25,13 @@ RUN sh -c "case $(arch) in aarch64) go_arch=arm64 ;; arm*) go_arch=arm ;; i386|i
 
 COPY config.docker.yml $CONF_DIR/config.yml
 
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
 VOLUME $OUTPUT_DIR
 
 EXPOSE $PORT
 
-ENTRYPOINT ["/usr/bin/bililive-go"]
-CMD ["-c", "/etc/bililive-go/config.yml"]
+WORKDIR ${WORKDIR}
+ENTRYPOINT [ "sh" ]
+CMD [ "/entrypoint.sh" ]

entrypoint.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+HOME=/srv/bililive
+
+chown -R ${PUID}:${PGID} ${HOME}
+
+umask ${UMASK}
+
+exec su-exec ${PUID}:${PGID} /usr/bin/bililive-go -c /etc/bililive-go/config.yml