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/motion-utils/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "motion-utils",
+  "version": "14.1.1",
+  "author": "Matt Perry",
+  "license": "MIT",
+  "repository": "https://github.com/motiondivision/motion",
+  "main": "./dist/cjs/index.js",
+  "types": "./dist/index.d.ts",
+  "module": "./dist/es/index.mjs",
+  "sideEffects": false,
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "require": "./dist/cjs/index.js",
+      "import": "./dist/es/index.mjs",
+      "default": "./dist/cjs/index.js"
+    }
+  },
+  "scripts": {
+    "clean": "rm -rf types dist lib",
+    "build": "yarn clean && tsc -p . && rollup -c",
+    "dev": "concurrently -c blue,red -n tsc,rollup --kill-others \"tsc --watch -p . --preserveWatchOutput\" \"rollup --config --watch --no-watch.clearScreen\"",
+    "test": "jest --config jest.config.json --max-workers=2"
+  },
+  "gitHead": "23b2a5697ffa854d6da4c26b04ea0d2425e033d7",
+  "devDependencies": {
+    "concurrently": "^7.3.0",
+    "jest": "^29.7.0",
+    "rollup": "4.59.0",
+    "typescript": "5.4.3"
+  }
+}