Add dlc.dat generation method

README.md

@@ -64,6 +64,14 @@ Each file in the `data/` directory can be used as a rule in this format: `geosit
 }
 ```
 
+## Generate `dlc.dat` manually
+
+- Install `golang` and `git`
+- Download and install project code: `go get -u -v --insecure github.com/v2ray/domain-list-community`
+- Generate `dlc.dat` (without `datapath` option means to use `data` directory of this project):
+  - `$(go env GOPATH)/bin/domain-list-community`
+  - `$(go env GOPATH)/bin/domain-list-community --datapath=/path/to/your/custom/data/directory`
+
 ## Structure of data
 
 All data are under `data/` directory. Each file in the directory represents a sub-list of domains, named by the file name. File content is in the following format.