set xdebug client port to default 9003 (#1775)

Author: dremsol

src/php/.devcontainer/Dockerfile

@@ -6,7 +6,7 @@ RUN yes | pecl install xdebug \
     && echo "zend_extension=$(find /usr/local/lib/php/extensions/ -name xdebug.so)" > /usr/local/etc/php/conf.d/xdebug.ini \
     && echo "xdebug.mode = debug" >> /usr/local/etc/php/conf.d/xdebug.ini \
     && echo "xdebug.start_with_request = yes" >> /usr/local/etc/php/conf.d/xdebug.ini \
-    && echo "xdebug.client_port = 9000" >> /usr/local/etc/php/conf.d/xdebug.ini \
+    && echo "xdebug.client_port = 9003" >> /usr/local/etc/php/conf.d/xdebug.ini \
     && rm -rf /tmp/pear
 
 # Install composer