build: refactor build steps and update GeoIP2 database integration

- Remove the `xcaddy` build step.
- Add a `go-task` build step.
- Change the way the GeoIP2 database is copied and used.
- Update `Caddyfile` to use the new path to GeoIP2 database.

Signed-off-by: ysicing <i@ysicing.me>

Author: ysicing

Dockerfile

@@ -2,25 +2,21 @@ FROM ysicing/god as builder
 
 RUN go install github.com/caddyserver/xcaddy/cmd/xcaddy@latest
 
+RUN go install github.com/go-task/task/v3/cmd/task@latest
+
 WORKDIR /go/src/github.com/ysicing/caddy2-geocn
 
 COPY . .
 
-RUN xcaddy build --with github.com/ysicing/caddy2-geocn=../caddy2-geocn
-
-FROM ysicing/debian as geoip
-
-WORKDIR /root
-
-RUN wget https://github.com/Hackl0us/GeoIP2-CN/raw/release/Country.mmdb
+RUN task build
 
 FROM ysicing/debian
 
 COPY docker /etc/caddy
 
 COPY --from=builder /go/src/github.com/ysicing/caddy2-geocn/caddy /usr/local/bin/caddy
 
-COPY --from=geoip /root/Country.mmdb /etc/caddy/Country.mmdb
+COPY --from=builder /go/src/github.com/ysicing/caddy2-geocn/Country.mmdb /etc/caddy/Country.mmdb
 
 RUN chmod +x /usr/local/bin/caddy && \
   mkdir -p \

docker/Caddyfile

@@ -25,7 +25,7 @@
     metrics /metrics
     @geofilter {
         geocn {
-            db_file "/etc/caddy/Country.mmdb"
+            geolocal "/etc/caddy/Country.mmdb"
         }
     }
     file_server @geofilter {
@@ -34,4 +34,4 @@
     file_server {
         root /etc/caddy/example/allow
     }
-}
+}