Fix error when building without existing site.conf from previous build

Signed-off-by: Chrissi^ <chris@tinyhost.de>

Fix error when building without existing site.conf from previous build
051e171e · chrissi^ · 78d234fd · 051e171e
Commit 051e171e authored 7 years ago by chrissi^
--- a/builder.sh
+++ b/builder.sh
@@ -34,7 +34,9 @@ DEBUG=""
 PRIO=2

 # prepare site.conf from template
-rm site/site.conf
+if [ -f site/site.conf ]; then
+  rm site/site.conf
+fi
 cp site/site.in site/site.conf
 sed  -i -e "s/AUTOUPDATERBRANCH/$BRANCH/g" site/site.conf