build: ship pre-built API bundle; images copy output instead of installing

- API: `pnpm build` bundles dist/ into apps/api/.output (esbuild), with
  Linux musl native packages for sharp and argon2 kept alongside
- docker/api.Dockerfile copies that output; no pnpm install on the server
- add dist/migrate.js (prisma migrate deploy equivalent, same
  _prisma_migrations table and lock) so the Prisma CLI is not needed at runtime
- pnpm-workspace: supportedArchitectures for linux/x64/musl
- admin: apps/admin/.env.production sets VITE_SITE_URL for the production build
- drop NPM_REGISTRY / SITE_URL build args from compose and .env.example
- gitignore: anchor node_modules rules so pre-built node_modules are committed
- README: describe the pre-built deploy flow

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

apps/web/.output/server/node_modules/@vue/reactivity/package.json

@@ -0,0 +1,55 @@
+{
+  "name": "@vue/reactivity",
+  "version": "3.5.44",
+  "description": "@vue/reactivity",
+  "main": "index.js",
+  "module": "dist/reactivity.esm-bundler.js",
+  "types": "dist/reactivity.d.ts",
+  "unpkg": "dist/reactivity.global.js",
+  "jsdelivr": "dist/reactivity.global.js",
+  "files": [
+    "index.js",
+    "dist"
+  ],
+  "exports": {
+    ".": {
+      "types": "./dist/reactivity.d.ts",
+      "node": {
+        "production": "./dist/reactivity.cjs.prod.js",
+        "development": "./dist/reactivity.cjs.js",
+        "default": "./dist/reactivity.cjs.prod.js"
+      },
+      "module": "./dist/reactivity.esm-bundler.js",
+      "import": "./dist/reactivity.esm-bundler.js",
+      "require": "./index.js"
+    },
+    "./*": "./*"
+  },
+  "sideEffects": false,
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/vuejs/core.git",
+    "directory": "packages/reactivity"
+  },
+  "buildOptions": {
+    "name": "VueReactivity",
+    "formats": [
+      "esm-bundler",
+      "esm-browser",
+      "cjs",
+      "global"
+    ]
+  },
+  "keywords": [
+    "vue"
+  ],
+  "author": "Evan You",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/vuejs/core/issues"
+  },
+  "homepage": "https://github.com/vuejs/core/tree/main/packages/reactivity#readme",
+  "dependencies": {
+    "@vue/shared": "3.5.44"
+  }
+}