Usage instructions

Signed-off-by: Rob Crowe <nobby.crowe@gmail.com>

Author: rcrowe

providers/configcat/README.md

@@ -0,0 +1,39 @@
+# ConfigCat OpenFeature provider for Go
+
+## Installation
+
+```shell
+# ConfigCat SDK
+go get github.com/configcat/go-sdk/v7
+
+# OpenFeature SDK
+go get github.com/open-feature/go-sdk/pkg/openfeature
+go get github.com/open-feature/go-sdk-contrib/providers/configcat
+```
+
+## Usage
+
+Here's a basic example:
+
+```go
+import (
+	"context"
+	"fmt"
+
+	sdk "github.com/configcat/go-sdk/v7"
+	configcat "github.com/open-feature/go-sdk-contrib/providers/configcat/pkg"
+	"github.com/open-feature/go-sdk/pkg/openfeature"
+)
+
+func main() {
+	provider := configcat.NewProvider(sdk.NewClient("..."))
+	openfeature.SetProvider(provider)
+
+	client := openfeature.NewClient("app")
+
+	val, err := client.BooleanValue(context.Background(), "flag_name", false, openfeature.NewEvaluationContext("123", map[string]any{
+		configcat.EmailKey: "test@example.com",
+	}))
+	fmt.Printf("val: %+v - error: %v\n", val, err)
+}
+```