Use Makefile instead of individual build scripts

.editorconfig

@@ -7,3 +7,8 @@ indent_style = space
 indent_style = tab
 end_of_line = lf
 charset = utf-8
+
+[Makefile]
+indent_style = tab
+end_of_line = lf
+charset = utf-8

Makefile

@@ -0,0 +1,31 @@
+AWS_CLI?=/usr/local/bin/aws
+TEMP_PATH=.temp
+RELEASE_ZIP=build/release.zip
+
+.PHONY: deps
+deps:
+	npm install
+
+.PHONY: package
+package:
+	# Prepare
+	-@rm -r "$(TEMP_PATH)" 2>/dev/null || true
+	-@rm "$(RELEASE_ZIP)" 2>/dev/null || true
+	@mkdir -p "$(TEMP_PATH)"
+
+	# Copy sources to temporary folder
+	@cp -R src package-lock.json package.json "$(TEMP_PATH)/"
+
+	# Install dependencies
+	@cd "$(TEMP_PATH)" && npm install --production
+
+	# Package artifact
+	@cd "$(TEMP_PATH)" && zip -r "../$(RELEASE_ZIP)" .
+
+	# Cleanup
+	@rm -r "$(TEMP_PATH)"
+
+.PHONY: publish
+publish:
+	@"$(AWS_CLI)" s3 cp "./cloudformation.yaml" "s3://aws-to-slack/"
+	@"$(AWS_CLI)" s3 cp "$(RELEASE_ZIP)" "s3://aws-to-slack/"

README.md

@@ -9,10 +9,10 @@ Forward AWS CloudWatch Alarms and other notifications from Amazon SNS to Slack.
 _AWS-to-Slack_ is a Lambda function written in Node.js that forwards alarms and
 notifications to a dedicated [Slack](https://slack.com) channel. It self-hosted
 in your own AWS environment and doesn't have any 3rd party dependencies other
-than the Google Charts API for rendering graphs.
+than the Google Charts API for rendering CloudWatch metrics.
 
 Supported notification formats:
-* CloudWatch Alarms
+* CloudWatch Alarms (incl. Metrics)
 * Elastic Beanstalk
 * Generic SNS messages
 * Plain text messages