Update installation guide

README.md

@@ -4,6 +4,35 @@ A CLI tool that checks all your apps for their Apple Silicon support.
 
 ## Installation
 
+### go install
+
 ```go
-go get github.com/harryzcy/ascheck
+go install github.com/harryzcy/ascheck
+```
+
+### Compile from source
+
+#### clone
+
+```shell
+git clone https://github.com/harryzheng/ascheck
+cd ascheck
+```
+
+#### get the dependencies
+
+```shell
+go mod tidy
+```
+
+#### build
+
+```shell
+go build -o ascheck .
+```
+
+#### run
+
+```shell
+./ascheck
 ```