add nginx default config file to use inside its composer

docker/nginx/default.conf

@@ -0,0 +1,16 @@
+server {
+    listen 80;
+    server_name localhost;
+
+    root /var/www/html/src;
+
+    location / {
+        try_files $uri $uri/ /index.php?$args;
+    }
+
+    location ~ \.php$ {
+        fastcgi_pass php:9000;
+        include fastcgi_params;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+    }
+}