feat: go env, go mod refresh

dump/golang/modules/README.md

@@ -0,0 +1,37 @@
+## GOROOT
+
+`GOROOT` defines the root directory of the Go SDK and go tools installation.
+It is set during the Go installation process.
+
+Typically, it remains immutable and should not be modified,
+except when you intend to use a different version of Go.
+
+## GOPATH
+
+`GOPATH` is an environment variable that specifies the location of your Go workspace.
+It consists of a colon-separated list of directories where Go searches for source code.
+
+`GOPATH` was traditionally used for managing dependencies in Go before the introduction of Go Modules.
+With Go Modules, setting `GOPATH` is no longer necessary.
+
+After Go 1.11, `$GOPATH/pkg/mod` is utilized to store all project dependencies,
+and `$GOPATH/bin` is used to store binaries generated by `go install`.
+
+## Go Modules
+
+Go Modules provide a mechanism for managing dependencies in Go outside the `$GOPATH`.
+They enable developers to define, version, and install dependencies more effectively,
+reducing reliance on `GOPATH` for dependency management.
+
+```bash
+go mod init github.com/fadyat/<project-name>
+
+# current dependency will be allowed to be used in the project
+# and we can find it in go.mod, go.sum and $GOPATH/pkg/mod directory
+go get github.com/gorilla/mux
+
+# installing the binary in $GOPATH/bin directory, but it's
+# better to use some prebuilt binaries from the internet
+go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.57.1
+```
+