Replace references to doma.in with s.test

README.md

@@ -54,7 +54,7 @@ Those servers can be exported and imported in other browsers, but if for some re
 [
   {
     "name": "Main server",
-    "url": "https://doma.in",
+    "url": "https://s.test",
     "apiKey": "09c972b7-506b-49f1-a19a-d729e22e599c"
   },
   {
@@ -85,7 +85,7 @@ If you want to pre-configure a single server, you can provide its config via env
     docker run \
         --name shlink-web-client \
         -p 8000:80 \
-        -e SHLINK_SERVER_URL=https://doma.in \
+        -e SHLINK_SERVER_URL=https://s.test \
         -e SHLINK_SERVER_API_KEY=6aeb82c6-e275-4538-a747-31f9abfba63c \
         shlinkio/shlink-web-client
     ```