docs: update README.md

Author: wonsikin

.gitignore

@@ -5,3 +5,4 @@ beehive-queen.conf.yaml
 beehive-worker.conf.yaml
 test/
 build/
+.goreleaser.yml

README.md

@@ -2,3 +2,75 @@ beehive
 ------------
 
 A cli tool to watch log information
+
+# Installation
+
+```shell
+$ go get github.com/wonsikin/beehive/cmd/beehive
+```
+
+# Usage
+
+### Help
+
+```shell
+$ beehive --help
+
+  NAME:
+   beehive - eat log messages and display it
+
+  USAGE:
+   beehive [global options] command [command options] [arguments...]
+
+  VERSION:
+   v0.1.0
+
+  COMMANDS:
+     init     create a configuration file
+     help, h  Shows a list of commands or help for one command
+
+  GLOBAL OPTIONS:
+   --role value, -r value  running as 'queen' or 'worker' (default: "queen")
+   --port value, -p value  listen port of beehive (default: 13000)
+   --config FILE, -c FILE  load configuration from FILE, default value is ./beehive-queen.conf.yaml when running as the queen role and is ./beehive-worker.conf.yaml when running as worker role
+   --help, -h              show help
+   --version, -v           print the version
+```
+
+### Init configuration file
+
+```
+$ beehive init
+
+  Use the arrow keys to navigate: ↓ ↑ → ←
+  ? Generate configuration for which role?:
+  ▸ queen
+    worker
+```
+
+### Running as the queen server
+
+```
+$ beehive -r queen
+
+  2018-04-02 18:53:13 info src/db/mongo/connect.go:22 connect to mongodb successfully
+  2018-04-02 18:53:13 info cmd/beehive/app.go:120 beehive is served at :13000
+```
+
+### Running as the worker
+
+```
+$ beehive -r worker
+
+  Worker arturo-n1.local is running
+  2018/04/02 18:55:58 Seeked ./log.log - &{Offset:0 Whence:2}
+```
+
+
+# TODO
+
+* [x] merge two cli into one
+* [ ] supported multi log sources
+* [ ] management platform
+* [ ] workers' health report
+* [ ] set log level and log path parameter