fix: payload building issues

apps/web/Dockerfile

@@ -1,15 +1,17 @@
 # syntax=docker/dockerfile:1.7
 #
-# Single-shot build image for the Astro site. The production deployment uses
-# nginx:1.27-alpine with a bind mount to apps/web/dist (see docker-compose.yml),
-# so the webhook can rewrite the site without rebuilding any image.
+# Astro static site production image. Built and run by docker-compose.
 #
-# You only need this Dockerfile if you want a self-contained static site
-# image (e.g. for a registry). For the normal homeserver flow, this image
-# is never built.
+# Multi-stage:
+#   deps   - installs the workspace (only apps/web and apps/cms are
+#            needed for the web build, but we keep apps/cms/package.json
+#            so the workspace resolves cleanly).
+#   build  - runs `astro build` to produce apps/web/dist.
+#   runtime - small nginx:1.27-alpine serving the baked-in dist/ and
+#            the custom nginx-default.conf.
 #
-# We install pnpm globally via npm to avoid corepack's strict version
-# negotiation across Node 20 minor versions.
+# We install pnpm via `npm install -g pnpm@9` instead of corepack so
+# the version negotiation is unambiguous across Node 20 minor releases.
 
 FROM node:20-alpine AS base
 RUN npm install -g pnpm@9
@@ -30,7 +32,7 @@ RUN if [ -f pnpm-lock.yaml ]; then \
 FROM deps AS build
 ENV PUBLIC_PAYLOAD_API=https://cms.softvowels.example
 ENV PUBLIC_SITE_URL=https://softvowels.example
-ENV PAYLOAD_API_INTERNAL=http://cms:3000
+ENV PAYLOAD_API_INTERNAL=http://softvowels-cms:3000
 COPY apps/web ./apps/web
 WORKDIR /repo/apps/web
 RUN pnpm run build