Add hot-reload docker-compose.dev.yml

Dev stack with live reload: Postgres + backend (hypercorn --reload, src mounted)
+ Vite dev server (mounted, proxies /api to the api service). vite proxy target
is now env-configurable (VITE_API_TARGET, defaults localhost:5000 for host dev).
README documents both compose files (dev hot-reload vs prod image).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FRgehjoz7Yv8LkUfADxACm

README.md

@@ -39,7 +39,14 @@ npm install
 npm run dev        # http://localhost:5173
 ```
 
-Or run the whole stack in Docker:
+Or run it in Docker. **Hot-reload dev stack** (edit code, changes reload live) —
+Postgres + backend + Vite dev server, app at http://localhost:5173:
+
+```sh
+docker compose -f docker-compose.dev.yml up
+```
+
+Or the **full production image** (SPA baked in) at http://localhost:5000:
 
 ```sh
 docker compose up --build
@@ -47,10 +54,12 @@ docker compose up --build
 
 ## Milestones
 
-- **M0 — Foundation & Identity** *(in progress)*: Quart+Vue+Postgres skeleton,
-  native auth, sharing-ACL spine, Fabled-Git CI.
-- M1 — Capture Core: note model + masonry board (quick-add, colors, pin,
-  edit-in-place, archive, trash).
+- **M0 — Foundation & Identity** ✅: Quart+Vue+Postgres skeleton, native auth,
+  sharing-ACL spine, Fabled-Git CI.
+- **M1 — Capture Core** ✅: note model + masonry board (quick-add, colors, pin,
+  edit-in-place, archive, trash+restore).
+- **M1.5 — Roles & DB-backed Settings** ✅: first user is admin, admin Settings UI,
+  `DATABASE_URL` is the only required env.
 - M2 — Organize: labels/tags, search, checklists, attachments.
 - M3 — Second-brain seeds: `[[wiki-links]]`, backlinks, graph view, reminders.
 - M4 — Launch hardening: responsive/PWA, settings UI, polish.