Fix: compatible with Go v1.16

The flag `--insecure` in go get command has been deprecated in Go v1.16

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
       - name: Set up Go 1.x.y
         uses: actions/setup-go@v2
         with:
-          go-version: "^1.15.3"
+          go-version: ^1.16
 
       - name: Set variables
         run: |
@@ -39,7 +39,6 @@ jobs:
 
       - name: Build geoip.dat
         run: |
-          go mod download
           go run ./ --country=./geoip/GeoLite2-Country-Locations-en.csv --ipv4=./geoip/GeoLite2-Country-Blocks-IPv4.csv --ipv6=./geoip/GeoLite2-Country-Blocks-IPv6.csv
 
       - name: Generate geoip.dat sha256 checksum

README.md

@@ -4,8 +4,8 @@ Automatically weekly release of `geoip.dat` for V2Ray.
 
 ## Download links
 
-- **geoip.dat**：[https://github.com/v2fly/geoip/raw/release/geoip.dat](https://github.com/v2fly/geoip/raw/release/geoip.dat)
-- **geoip.dat.sha256sum**：[https://github.com/v2fly/geoip/raw/release/geoip.dat.sha256sum](https://github.com/v2fly/geoip/raw/release/geoip.dat.sha256sum)
+- **geoip.dat**：[https://github.com/v2fly/domain-list-community/releases/latest/download/geoip.dat](https://github.com/v2fly/domain-list-community/releases/latest/download/geoip.dat)
+- **geoip.dat.sha256sum**：[https://github.com/v2fly/domain-list-community/releases/latest/download/geoip.dat.sha256sum](https://github.com/v2fly/domain-list-community/releases/latest/download/geoip.dat.sha256sum)
 
 ## Usage example
 
@@ -57,6 +57,17 @@ Automatically weekly release of `geoip.dat` for V2Ray.
 }
 ```
 
+## Generate `geoip.dat` manually
+
+- Install `golang` and `git`
+- Clone project code: `git clone https://github.com/v2fly/geoip.git`
+- Download `GeoLite2-Country-CSV.zip` from [MaxMind](https://dev.maxmind.com/geoip/geoip2/geolite2/), then unzip it to `geoip` directory
+- Navigate to project root directory: `cd geoip`
+- Install project dependencies: `go mod download`
+- Generate geoip.dat: `go run ./`
+
+Run `go run ./ --help` for more usage information.
+
 ## Notice
 
 This product includes GeoLite2 data created by MaxMind, available from [MaxMind](http://www.maxmind.com).

go.mod

@@ -1,10 +1,8 @@
 module github.com/v2fly/geoip
 
-go 1.15
+go 1.16
 
 require (
+	github.com/v2fly/v2ray-core/v4 v4.34.1-0.20210224091244-9d13f99633c8
 	google.golang.org/protobuf v1.25.0
-	v2ray.com/core v4.19.1+incompatible
 )
-
-replace v2ray.com/core => github.com/v2fly/v2ray-core v0.0.0-20201225111350-8c5b392f2763