fix start script

scripts/teltonika/racecore-nginx.init

@@ -4,14 +4,26 @@ START=95
 STOP=10
 USE_PROCD=1
 
-NGINX_BIN="/usr/sbin/nginx"
+NGINX_BIN=""
 NGINX_CONF="/etc/nginx/nginx.conf"
 
+resolve_nginx() {
+    for candidate in "$(command -v nginx 2>/dev/null)" /usr/local/usr/sbin/nginx /usr/sbin/nginx /usr/bin/nginx; do
+        if [ -n "$candidate" ] && [ -x "$candidate" ]; then
+            NGINX_BIN="$candidate"
+            return 0
+        fi
+    done
+    logger -t racecore-nginx "nginx executable not found"
+    return 1
+}
+
 prepare_runtime() {
     mkdir -p /tmp/nginx/client_body /tmp/nginx/proxy /tmp/nginx/fastcgi /tmp/nginx/uwsgi /tmp/nginx/scgi
 }
 
 start_service() {
+    resolve_nginx || return 1
     prepare_runtime
     "$NGINX_BIN" -t -c "$NGINX_CONF" || return 1
     procd_open_instance
@@ -24,6 +36,7 @@ start_service() {
 }
 
 reload_service() {
+    resolve_nginx || return 1
     prepare_runtime
     "$NGINX_BIN" -t -c "$NGINX_CONF" || return 1
     "$NGINX_BIN" -s reload -c "$NGINX_CONF"