adding a quickstart guide

Author: Ruben2424

examples/readme.md

@@ -0,0 +1,35 @@
+# Getting started 
+This is a quick starting guide to run the example.
+
+## Start the Server
+To start the example server you can run following command:
+
+```bash
+> cargo run --example server -- --listen=127.0.0.1:4433
+```
+
+This will start an the HTTP/3 server, listening to 127.0.0.1 on port 4433.  
+This also generates a self-signed certificate for encryption.
+
+## Start the client
+To start the example client you can run following command:
+
+```bash
+> cargo run --example client -- https://localhost:4433 --insecure=true
+```
+
+This sends an HTTP request to the server.  
+The `--insecure=true` allows the client to accept invalid certificates like the self-signed, which the server has created.
+
+## Add some content to the Server
+So that the server responds something you can provide a directory with content files.
+
+```bash
+> cargo run --example server -- --listen=127.0.0.1:4433 --dir=content/root
+```
+
+To start the client simply put the file name behind the URI:
+
+```bash
+> cargo run --example client -- https://localhost:4433/index.html --insecure=true
+```