Add express server which runs Makefile targets

.editorconfig

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+# EditorConfig is awesome: http://EditorConfig.org
+
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{json,js,html,css,yml}]
+indent_style = space
+indent_size = 2

.eslintrc.json

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+{
+  "extends": ["airbnb-base", "plugin:prettier/recommended"],
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2018
+  },
+  "rules": {
+    "no-console": "off",
+    "no-underscore-dangle": "off"
+  }
+}

.gitignore

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+node_modules

Dockerfile

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+FROM alpine:3.9 as build
+
+RUN apk add --no-cache make nodejs npm
+
+WORKDIR /root
+COPY package*.json ./
+RUN npm install
+
+COPY src /root/src
+EXPOSE 3000
+CMD ["npm", "start"]

Makefile

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+REGISTRY_HOST = docker.io
+USERNAME = expelledboy
+NAME = $(shell basename $(CURDIR))
+IMAGE = $(REGISTRY_HOST)/$(USERNAME)/$(NAME)
+
+.EXPORT_ALL_VARIABLES:
+.DEFAULT: help
+
+## ==
+.PHONY: help build lint unit test clean
+
+help: ## Print help messages
+	@sed -n 's/^\([a-zA-Z_-]*\):.*## \(.*\)$$/\1 -- \2/p' Makefile
+
+build: ## Build docker image
+	docker build -t $(IMAGE) .
+
+test: ## Run simple unit test
+	docker run -d --rm \
+		--name $(NAME) \
+		-v $(PWD):/webhook/ \
+		-p 3000:3000 \
+		$(IMAGE)
+	sleep 5
+	-curl http://localhost:3000/help
+	docker stop $(NAME)
+
+# ==
+.PHONY: on-tag bump publish
+
+on-tag:
+	@git describe --exact-match --tags $$(git log -n1 --pretty='%h')
+
+bump-package: IMPACT = patch
+bump-package:
+	npm version $(IMPACT)
+
+bump: VERSION = $(shell node -p "require('./package.json').version")
+bump: bump-package ## Bump release version eg. `make IMPACT=patch bump`
+	git add package.json
+	git commit -m 'Release version $(VERSION)'
+	git tag $(VERSION)
+
+publish: VERSION = $(shell git describe --always)
+publish: on-tag build ## Push docker image to $(REGISTRY_HOST)
+	echo docker push $(IMAGE):$(VERSION)
+	echo docker push $(IMAGE):latest
+
+# ==