Fix: compatible with Go v1.16 (#422)

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

Fixes #421
Fixes #420

README.md

@@ -8,8 +8,8 @@ This project is not opinionated. In other words, it does NOT endorse, claim or i
 
 ## Download links
 
-- **dlc.dat**：[https://github.com/v2fly/domain-list-community/raw/release/dlc.dat](https://github.com/v2fly/domain-list-community/raw/release/dlc.dat)
-- **dlc.dat.sha256sum**：[https://github.com/v2fly/domain-list-community/raw/release/dlc.dat.sha256sum](https://github.com/v2fly/domain-list-community/raw/release/dlc.dat.sha256sum)
+- **dlc.dat**：[https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat](https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat)
+- **dlc.dat.sha256sum**：[https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat.sha256sum](https://github.com/v2fly/domain-list-community/releases/latest/download/dlc.dat.sha256sum)
 
 ## Usage example
 
@@ -67,10 +67,14 @@ Each file in the `data` directory can be used as a rule in this format: `geosite
 ## Generate `dlc.dat` manually
 
 - Install `golang` and `git`
-- Download and install project code: `go get -v --insecure github.com/v2fly/domain-list-community`
-- Generate `dlc.dat` (without `datapath` option means to use `data` directory of this repository in `$GOPATH`):
-  - `${GOPATH:-$(go env GOPATH)}/bin/domain-list-community`
-  - `${GOPATH:-$(go env GOPATH)}/bin/domain-list-community --datapath=/path/to/your/custom/data/directory`
+- Clone project code: `git clone https://github.com/v2fly/domain-list-community.git`
+- Navigate to project root directory: `cd domain-list-community`
+- Install project dependencies: `go mod download`
+- Generate `dlc.dat` (without `datapath` option means to use domain lists in `data` directory of current working directory):
+  - `go run ./`
+  - `go run ./ --datapath=/path/to/your/custom/data/directory`
+
+Run `go run ./ --help` for more usage information.
 
 ## Structure of data