Fix container build for sharp, slug lookup and select fields

- build the runtime image so libvips lands next to the sharp binary
- GET /api/v1/posts/:slug finds drafts by slug for write clients
- media upload documented with project slug instead of a project id
- own select control instead of the browser default
- quieter sidebar footer, project name leads to its entries

Dockerfile

@@ -1,3 +1,4 @@
+# syntax=docker/dockerfile:1
 FROM node:24-alpine AS base
 RUN corepack enable && corepack prepare pnpm@latest --activate
 
@@ -23,7 +24,10 @@ ENV NODE_ENV=production
 RUN addgroup --system --gid 1001 nodejs && adduser --system --uid 1001 nextjs
 
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
-COPY --from=sharp --chown=nextjs:nodejs /out ./node_modules/.pnpm/
+RUN --mount=from=sharp,source=/out,target=/tmp/img \
+	rm -rf node_modules/.pnpm/@img+* \
+	&& cp -R /tmp/img/. node_modules/.pnpm/ \
+	&& chown -R nextjs:nodejs node_modules/.pnpm
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 COPY --from=builder --chown=nextjs:nodejs /app/drizzle ./drizzle
 COPY --from=builder --chown=nextjs:nodejs /app/docs/style-guide.md ./docs/style-guide.md