Dokploy deploy: Dockerfile, DB CA cert, blog images, CSP

- Add Dockerfile (multi-stage Node 20), .dockerignore, docker-compose.yml, and
  DEPLOY-DOKPLOY.md for container deployment on Dokploy.
- Commit the DigitalOcean managed-Postgres Project CA cert (certs/ca-certificate.crt)
  so production TLS verification (fail-closed) works in-container. Public CA, safe to commit.
- Blog cover images served from DO Spaces; allow *.digitaloceanspaces.com in the prod CSP img-src.
- Includes the AI (case summaries) and Cloudflare Turnstile bot-protection features.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apps/web/vite.config.ts

@@ -4,6 +4,8 @@ import path from 'node:path';
 
 export default defineConfig({
   plugins: [react()],
+  // VITE_* vars live in the monorepo root .env alongside the API's config.
+  envDir: path.resolve(__dirname, '../..'),
   resolve: {
     alias: {
       '@': path.resolve(__dirname, 'src'),