Add deployment: Dockerfile, compose, proxy config, and docs

One container plus a Postgres behind any TLS-terminating proxy. Nothing is
specific to a particular host.

The app and API are served from a SINGLE origin. This is not tidiness: browser
auth sessions live in per-origin storage, so splitting them across two
hostnames makes sign-in loop in a way that presents as a server fault. The
short alias redirects rather than serving a second origin.

Two safety properties verified by running the image, not by reading the code:

- With NODE_ENV=production and no SUPABASE_URL, the process refuses to start
  and says why. Serving the whole CRM unauthenticated is a worse outcome than
  failing to deploy, so the failure is deliberate and loud.
- In production the development auth bypass does not apply: an unauthenticated
  request to /api/dashboard returns 401 rather than adopting the first user in
  the table.

The Dockerfile typechecks all six packages as a build gate, so a deploy that
does not compile fails at build time rather than in front of a user. Runtime
runs unprivileged as `node`, and Postgres is not published to the host.

Docs cover the ontology and why it is shaped this way, agent connection for
Claude Code / Codex / prime-agent / Buzz, and the provenance rules governing
seed data about real people — including how to have your record removed.

Verified: image builds, container reports healthy, serves the SPA, enforces
auth, and the production guard exits non-zero.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

deploy/Caddyfile.example

@@ -0,0 +1,29 @@
+# Caddy — reverse proxy for PIG.
+#
+# Serve the app and the API from ONE hostname. Auth sessions live in
+# per-origin browser storage, so splitting them across two hostnames makes
+# sign-in loop endlessly in a way that looks like a server fault.
+
+primeintellectgrowth.com, www.primeintellectgrowth.com {
+	encode zstd gzip
+
+	# The MCP endpoint, when Streamable HTTP is enabled. Same origin as the
+	# app so it shares the session and needs no CORS allowance.
+	reverse_proxy 127.0.0.1:8920
+
+	header {
+		Strict-Transport-Security "max-age=31536000; includeSubDomains"
+		X-Content-Type-Options "nosniff"
+		X-Frame-Options "DENY"
+		Referrer-Policy "strict-origin-when-cross-origin"
+		# The app is entirely first-party except for the auth provider, which
+		# it must reach over XHR.
+		Content-Security-Policy "default-src 'self'; connect-src 'self' https://*.supabase.co; img-src 'self' data:; style-src 'self' 'unsafe-inline'; script-src 'self'; frame-ancestors 'none'; base-uri 'self'"
+		-Server
+	}
+}
+
+# Short alias. A redirect rather than a second origin, deliberately — see above.
+pig.karti.ai {
+	redir https://primeintellectgrowth.com{uri} permanent
+}