ci(Dockerfile): set pnpm version (#4862)

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

Author: Barsnes

Dockerfile

@@ -5,7 +5,9 @@ ARG APP_ENV
 FROM node:24.14.1-slim@sha256:b506e7321f176aae77317f99d67a24b272c1f09f1d10f1761f2773447d8da26c AS base
 ENV PNPM_HOME="/pnpm"
 ENV PATH="$PNPM_HOME:$PATH"
+ENV CI=true
 RUN corepack enable
+RUN corepack install -g pnpm@10.33.2
 
 FROM base AS packages
 COPY . /usr/src/app