feat: use linuxserver based docker image

Dockerfile

@@ -1,4 +1,5 @@
-FROM alpine:latest
+FROM ghcr.io/linuxserver/baseimage-alpine:3.14
+
 RUN apk --update add ca-certificates \
                      mailcap \
                      curl
@@ -6,10 +7,10 @@ RUN apk --update add ca-certificates \
 HEALTHCHECK --start-period=2s --interval=5s --timeout=3s \
   CMD curl -f http://localhost/health || exit 1
 
-VOLUME /srv
-EXPOSE 80
+# copy local files
+COPY docker/root/ /
+COPY filebrowser /usr/bin/filebrowser
 
-COPY .docker.json /.filebrowser.json
-COPY filebrowser /filebrowser
-
-ENTRYPOINT [ "/filebrowser" ]
+# ports and volumes
+VOLUME /srv /config /database
+EXPOSE 80