Add README

Author: ubbn

README.md

@@ -0,0 +1,32 @@
+# Firebase JWT
+
+This Go package provides a convienent method to parse auth JWT issued by [Firebase Authentication](https://firebase.google.com/docs/auth). 
+
+## Auth token
+
+An authentication token (auth token) is a computer generated code that helps to verify if user's identity is authentic or not. 
+JWT or Json Web Token is one type of auth token which is used as Bearer token and self-signed. Read more at [JWT.io](https://jwt.io/) 
+
+## Usage
+
+### Installation guide
+
+```bash
+go get github.com/ubbn/[email protected]
+```
+
+### Import it
+
+```go
+import github.com/ubbn/firebasejwt
+
+func main() {
+    claims, err := firebasejwt.ParseFirebaseJWT("<token issued by firebase auth>")
+    fmt.Println(claims["name"])
+    fmt.Println(claims["email"])
+}
+```
+
+### More
+
+Package documentation can be found on [pkg.go.dev](https://pkg.go.dev/github.com/ubbn/firebasejwt)