fix(docker): copy scripts/ before npm install; skip postinstall in deploy stage

The postinstall hook (scripts/postinstall.mjs) runs during `npm install`, but the
Dockerfile only copied package*.json before that step, so the script wasn't present.

- Copy scripts/ alongside package*.json in the builder stage.
- Add --ignore-scripts to the deploy-stage npm install: flowbite-svelte is a
  devDependency and won't be installed there, so the postinstall patch is irrelevant
  and the script file won't be available in that stage anyway.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -3,7 +3,9 @@ FROM node:24-alpine AS builder
 WORKDIR /app
 
 # Install dependencies first for better Docker layer caching.
+# scripts/ must be copied before npm install because postinstall.mjs runs during install.
 COPY package*.json ./
+COPY scripts/ ./scripts/
 RUN npm install
 
 # Copy the rest of the source code.
@@ -47,7 +49,9 @@ COPY --from=builder /app/package.json .
 COPY --from=builder /app/package-lock.json .
 
 # Install only production dependencies.
-RUN npm install --omit=dev
+# --ignore-scripts skips postinstall (which patches flowbite-svelte dist files);
+# flowbite-svelte is a devDependency and won't be installed here anyway.
+RUN npm install --omit=dev --ignore-scripts
 
 # Copy the runtime env file (non-PUBLIC vars for the Node server).
 COPY --from=builder /app/.env.runtime .env