Fix for monorepo APP_DIR prefix nginx

dockerfiles/docker-build/scripts/ensureNginxDockerFile

@@ -2,10 +2,10 @@
 
 # ensure nginx config
 
-if [ ! -f nginx.conf ]; then
+if [ ! -f $APP_DIR/nginx.conf ]; then
     echo "Creating nginx.conf"
 
-    cat >nginx.conf <<NGINX
+    cat >$APP_DIR/nginx.conf <<NGINX
     
 server {
     listen       8080;