Migrate from npm to pnpm across entire project

• Update all GitHub workflow files to use pnpm instead of npm
• Replace npm commands with pnpm equivalents in devcontainer scripts
• Remove package-lock.json files and update to use pnpm-lock.yaml
• Consolidate node version references to use server/.nvmrc

web/Dockerfile

@@ -1,17 +1,17 @@
 FROM node:22.16.0-alpine3.20@sha256:2289fb1fba0f4633b08ec47b94a89c7e20b829fc5679f9b7b298eaa2f1ed8b7e
 
-RUN apk add --no-cache tini bash
+ENV CHOKIDAR_USEPOLLING=true \
+  PATH="${PATH}:/usr/src/app/web/bin" \
+  COREPACK_HOME=/tmp
 
-USER node
-WORKDIR /usr/src/app
-
-COPY --chown=node:node ./web/package* ./web/
+RUN npm install --global corepack@latest && \
+  corepack enable && corepack install -g pnpm && \
+  apk add --no-cache tini make bash&& \
+  mkdir -p /buildcache/pnpm-store && \
+  pnpm config set store-dir /buildcache/pnpm-store
 
 WORKDIR /usr/src/app/web
-RUN npm ci
 
-ENV CHOKIDAR_USEPOLLING=true \
-  PATH="${PATH}:/usr/src/app/web/bin"
 EXPOSE 24678
 EXPOSE 3000
 ENTRYPOINT ["tini", "--", "/bin/bash", "-c"]