Allow Docker Apache write permissions

I had a permission problem using PHP scripts, 
Running ` chown -R www-data /var/www/html ` after SSHing into the docker container helped fixing the problem.

src/lib/buildPacks/php.ts

@@ -11,6 +11,7 @@ const createDockerfile = async (data, image): Promise<void> => {
 	Dockerfile.push(`COPY ./${baseDirectory || ''} /var/www/html`);
 	Dockerfile.push(`EXPOSE 80`);
 	Dockerfile.push('CMD ["apache2-foreground"]');
+	Dockerfile.push('RUN chown -R www-data /var/www/html');
 	await fs.writeFile(`${workdir}/Dockerfile`, Dockerfile.join('\n'));
 };