add usage.png image

Author: timzaak

README.md

@@ -35,6 +35,9 @@ docker run --rm  -v ${pwd}/private.conf:/server/config/application.conf -v${pwd}
 # open your browser to access http://127.0.0.1:9000
 
 ```
+设置 usage.png 大小
+<img src="/doc/usage.png" alt="usage" width="500" />
+
 The params are:
 
 * dns: A list of domain-to-IP mappings in the format ip:domain. These mappings will be added to the DNS resolver.

doc/usage.png

@@ -7,7 +7,6 @@ import org.apache.pekko.http.scaladsl.model.{AttributeKeys, HttpHeader, HttpRequ
 import org.apache.pekko.stream.OverflowStrategy
 import org.apache.pekko.stream.scaladsl.*
 import sttp.capabilities.pekko.PekkoStreams
-import sttp.model.HeaderNames
 import sttp.tapir.*
 import sttp.tapir.model.ServerRequest
 import sttp.tapir.server.pekkohttp.PekkoHttpServerInterpreter