Improve container

Start dumb-init as first process in container.

See https://snyk.io/blog/10-best-practices-to-containerize-nodejs-web-applications-with-docker/
See https://engineeringblog.yelp.com/2016/01/dumb-init-an-init-for-docker.html

Dockerfile

@@ -1,5 +1,7 @@
 FROM node:22-alpine AS build
 
+RUN apk add dumb-init
+
 RUN corepack enable
 RUN yarn set version berry
 
@@ -21,6 +23,8 @@ ARG PORT=3010
 
 ENV NODE_ENV production
 
+COPY --from=build /usr/bin/dumb-init /usr/bin/dumb-init
+
 RUN apk update && \
   apk upgrade --no-cache && \
   apk add --no-cache ffmpeg exiftool && \
@@ -39,4 +43,4 @@ COPY --chown=${USER_NAME}:${GROUP_NAME} --from=build /home/node/aws-upload-servi
 
 EXPOSE $PORT
 
-CMD [ "node", "dist/index.js" ]
+CMD [ "dumb-init", "node", "dist/index.js" ]