[Chat] Add OpenGraph card for chat invite links (#10629)

Dockerfile.bskyogcard

@@ -1,17 +1,22 @@
 FROM node:24.15.0-alpine3.22 AS build
 
+# Tells pnpm to run non-interactively (needed for install/script steps)
+ENV CI=true
+
 # Move files into the image and install
 WORKDIR /app
 
 COPY ./bskyogcard/package.json ./
-COPY ./bskyogcard/yarn.lock ./
-RUN yarn install --frozen-lockfile
+COPY ./bskyogcard/pnpm-lock.yaml ./
+COPY ./bskyogcard/pnpm-workspace.yaml ./
+RUN npm install --global pnpm@11.1.3
+RUN pnpm install --frozen-lockfile
 
 COPY ./bskyogcard ./
 
 # build then prune dev deps
-RUN yarn install-fonts && yarn build
-RUN yarn install --production --ignore-scripts --prefer-offline
+RUN pnpm install-fonts && pnpm build
+RUN pnpm install --prod --ignore-scripts --prefer-offline
 
 # Uses assets from build stage to reduce build size
 FROM node:24.15.0-alpine3.22