Update Dockerfile (#335)

Fix #305

Dockerfile

@@ -1,6 +1,7 @@
 FROM alpine:3.16
 
 RUN apk add --no-cache go hugo git make perl
+RUN git config --global --add safe.directory '/quartz'
 RUN go install github.com/jackyzha0/hugo-obsidian@latest
 ENV PATH="/root/go/bin:$PATH"
 RUN git clone https://github.com/jackyzha0/quartz.git /quartz