Add deployment pipeline, maintenance page and project config

- Makefile: install_dev, install_prod, migration/migrate commands
- docker-compose-dev: add Caddy and Bun services
- docker-compose-prod: remove exposed pgbouncer port
- Ansible: Caddy template with maintenance mode (503), vault, deploy playbook
- Gitea workflow: manual deploy to production
- Maintenance page (Neubrutalism style)
- LICENSE: proprietary license

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -0,0 +1,17 @@
+name: Deploy to production
+
+on:
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs_on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Ansible
+        run: apt-get update && apt-get install -y ansible
+
+      - name: Deploy Caddy config
+        run: ansible-playbook -i ansible/hosts.ini ansible/deploy-caddy.yml --vault-password-file <(echo "${{ secrets.ANSIBLE_VAULT_PASSWORD }}")