feat: Use node 18 alpine (#312)

* feat: Use node 18 alpine

* fix: Add new line

Dockerfile

@@ -1,12 +1,12 @@
 ARG RUN
 
-FROM node:16 as builder
+FROM node:18-alpine as builderenv
 
 WORKDIR /app
 
 # some packages require a build step
-RUN apt-get update
-RUN apt-get -y -qq install python-setuptools python-dev build-essential
+RUN apk update
+RUN apk add --no-cache py3-setuptools python3-dev build-base
 
 # install dependencies
 COPY package.json /app/package.json
@@ -21,8 +21,20 @@ RUN npm run test
 # remove devDependencies, keep only used dependencies
 RUN npm ci --only=production
 
-# build the release app
-FROM node:16
+FROM node:18-alpine
+
+RUN apk update
+RUN apk add --no-cache tini
+
+# NODE_ENV is used to configure some runtime options, like JSON logger
+ENV NODE_ENV production
+
 WORKDIR /app
-COPY --from=builder /app /app
-ENTRYPOINT [ "./entrypoint.sh" ]
+COPY --from=builderenv /app /app
+# Please _DO NOT_ use a custom ENTRYPOINT because it may prevent signals
+# (i.e. SIGTERM) to reach the service
+# Read more here: https://aws.amazon.com/blogs/containers/graceful-shutdowns-with-ecs/
+#            and: https://www.ctl.io/developers/blog/post/gracefully-stopping-docker-containers/
+ENTRYPOINT ["/sbin/tini", "--"]
+# Run the program under Tini
+CMD [ "/usr/local/bin/node", "--trace-warnings", "--abort-on-uncaught-exception", "--unhandled-rejections=strict", "dist/index.js" ]