gzip before sending

Change-type: patch
Signed-off-by: Ryan Cooke <[email protected]>

core/Dockerfile

@@ -24,6 +24,7 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
 	vim \
 	build-essential \
 	make \
+	gzip \
 	python && \
 	apt-get clean && \
 	rm -rf /var/lib/apt/lists/*

core/lib/common/worker.js

@@ -135,6 +135,10 @@ module.exports = class Worker {
 	 * @category helper
 	 */
 	async flash(imagePath) {
+
+		this.logger.log(`Gzipping image...`);
+		await exec(`gzip ${imagePath}`);
+
 		let attempt = 0;
 		await retry(
 			async () => {
@@ -187,9 +191,9 @@ module.exports = class Worker {
 						}
 					});
 
+					// append .gz extension as we zipped it above
 					pipeline(
-						fs.createReadStream(imagePath),
-						createGzip({ level: 6 }),
+						fs.createReadStream(`${imagePath}.gz`),
 						req,
 					);
 				});