Dockerfile: upload limit increased

Dockerfile

@@ -3,7 +3,7 @@ FROM monica:apache
 # Use the default production configuration
 RUN mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"
 # increase php upload limit
-RUN sed -i 's/upload_max_filesize = 2M/upload_max_filesize = 10M/' "$PHP_INI_DIR/php.ini"
+RUN sed -i 's/upload_max_filesize = 2M/upload_max_filesize = 50M/' "$PHP_INI_DIR/php.ini"
 
 # supervisord dependencies
 RUN apt-get update && \