Fix script/server when bin/ is not in PATH

This fixes an issue, when the bin/ directory of diaspora is not in the PATH variable

closes #7281

Changelog.md

@@ -3,6 +3,7 @@
 ## Refactor
 
 ## Bug fixes
+* Fix path to `bundle` in `script/server` [#7281](https://github.com/diaspora/diaspora/pull/7281)
 
 ## Features
 

script/server

@@ -87,7 +87,7 @@ if [ $? -eq 0 ]; then
 fi
 
 # Check if bundle is complete
-if ! bundle check > /dev/null
+if ! bin/bundle check > /dev/null
 then
   fatal "Your bundle is not up to date, run the command \"bundle install\""
 fi