Update README

README.md

@@ -1,4 +1,50 @@
 # slog-grpc-mw
-gRPC middleware for Slog logger
+gRPC Go middleware for Cdr's Slog logger: <https://github.com/cdr/slog>
 
 ![Output Screenshot](https://raw.githubusercontent.com/hassieswift621/slog-grpc-mw/dev/screenshot_output.png)
+
+## Install
+```text
+go get github.com/hassieswift621/slog-grpc-mw
+```
+
+## Example Usage
+```go
+func main() {
+    // Create GRPC server.
+    srv := grpc.NewServer(
+        grpc.UnaryInterceptor(
+            grpc_middleware.ChainUnaryServer(
+                grpc_slog.UnaryServerInterceptor(grpcLogger(true)),
+            ),
+        ),
+    )
+}
+
+func grpcLogger(verbose bool) slog.Logger {
+	logger := sloghuman.Make(os.Stdout).Leveled(slog.LevelWarn).Named("grpc")
+
+	if verbose {
+		logger = logger.Leveled(slog.LevelDebug)
+	}
+
+	return logger
+}
+```
+
+## License
+```text
+Copyright ©2020 Hassie.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+```