Pin alpine version temporarily for pds docker build (#1976)

* pin alpine version temporarily for pds docker build

* fix

* add note

services/pds/Dockerfile

@@ -1,4 +1,6 @@
-FROM node:18-alpine as build
+# @NOTE just a temp fix: alpine3.19 breaks sharp install, see nodejs/docker-node#2009
+# see additional reference to this image further down.
+FROM node:18-alpine3.18 as build
 
 RUN npm install -g pnpm
 
@@ -35,7 +37,7 @@ RUN pnpm install --prod --shamefully-hoist --frozen-lockfile --prefer-offline >
 WORKDIR services/pds
 
 # Uses assets from build stage to reduce build size
-FROM node:18-alpine
+FROM node:18-alpine3.18
 
 RUN apk add --update dumb-init