chore(docs): document parameters

README.md

@@ -1,4 +1,6 @@
-A conversion extension to Chain conversion plugins. _Please note this project requires Drone server version 1.4 or higher._
+# drone-convert-chain
+
+A conversion extension to chain conversion plugins. _Please note this project requires Drone server version 1.4 or higher._
 
 ## Installation
 
@@ -16,6 +18,9 @@ $ docker run -d \
   --publish=3000:3000 \
   --env=DRONE_DEBUG=true \
   --env=DRONE_SECRET=bea26a2221fd8090ea38720fc445eca6 \
+  --env=TARGET_ENDPOINTS=https://convert1:8433,https://convert2:8443 \
+  --env=TARGET_SECRETS=4fce87fb3a28d462331dff6e1bb9c98b,2fd99e9939e4774ff9dfda816cbf93a9 \
+  --env=TARGET_SKIP_VERIFIES=false,false \
   --restart=always \
   --name=converter thomn/drone-convert-chain
 ```