Chore: clean up Dockerfile

Dockerfile

@@ -1,17 +1,23 @@
 FROM golang:latest as builder
+
 RUN wget http:https://geolite.maxmind.com/download/geoip/database/GeoLite2-Country.tar.gz -O /tmp/GeoLite2-Country.tar.gz && \
  tar zxvf /tmp/GeoLite2-Country.tar.gz -C /tmp && \
- cp /tmp/GeoLite2-Country_*/GeoLite2-Country.mmdb /Country.mmdb
+ mv /tmp/GeoLite2-Country_*/GeoLite2-Country.mmdb /Country.mmdb
+
 WORKDIR /clash-src
+
 COPY . /clash-src
+
 RUN go mod download && \
- GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags '-w -s' -o /clash && \
- chmod +x /clash
+ GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags '-w -s' -o /clash
 
 FROM alpine:latest
-RUN apk --no-cache add ca-certificates && \
- mkdir -p /root/.config/clash
+
+RUN apk add --no-cache ca-certificates
+
 COPY --from=builder /Country.mmdb /root/.config/clash/
-COPY --from=builder /clash .
+COPY --from=builder /clash /
+
 EXPOSE 7890 7891
+
 ENTRYPOINT ["/clash"]