chore(deps): pin dependencies (#32)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

server/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:iron-bookworm as dev
+FROM node:iron-bookworm@sha256:f3299f16246c71ab8b304d6745bb4059fa9283e8d025972e28436a9f9b36ed24 as dev
 
 WORKDIR /usr/src/app
 
@@ -65,7 +65,7 @@ ADD --chmod=444 https://download.geonames.org/export/dump/admin2Codes.txt /usr/s
 RUN umask 0333 && unzip /usr/src/resources/cities500.zip -d /usr/src/resources/ && \
     rm /usr/src/resources/cities500.zip && date --iso-8601=seconds | tr -d "\n" > /usr/src/resources/geodata-date.txt
 
-FROM node:iron-bookworm-slim as prod
+FROM node:iron-bookworm-slim@sha256:474988d2fa8ad6321db19dc941af70202b163fca06a6b4e7f56067eda0c72eb9 as prod
 WORKDIR /usr/src/app
 
 RUN sed -i -e's/ main/ main contrib non-free non-free-firmware/g' /etc/apt/sources.list.d/debian.sources