chore: remove dead migration tooling, stale README steps, and unused assets (#319)

## Summary

Removes dead/stale code that no longer serves any purpose. No logic
changes.

**Deleted files:**
- `scripts/create-migration.ts` — creates SQL files in a `migrations/`
directory that no longer exists
- `readme-assets/logo-circle.png` — only referenced in a commented-out
README block
- `readme-assets/preview.png` — zero references anywhere in repo
- `public/graphics/docs/analyze-data-chart.png` and `static-chart.png` —
orphaned from a removed docs port (`c07895da`); the consuming
`src/app/docs` and `src/content/docs` trees were deleted long ago

**`package.json` script cleanup:**
- Removed `db:migrations:create`, `db:migrations:apply` (broken — calls
nonexistent `scripts:apply-migrations`), `scripts:create-migration`, and
the empty `<<<<<<< Database` section header
- Removed redundant `scripts:check-all-env` alias (was just `bun
scripts:check-app-env`); inlined its 3 callers (`test:run`,
`test:watch`, `test:ui`) to use `scripts:check-app-env` directly

**`README.md` cleanup:**
- Title: `# E2B Dashboard` → `# Dashboard`
- Updated stack version: Next.js 15 → Next.js 16 (overview + features)
- Updated prereq: Node.js 18+ → Node.js 20.9+ (Next.js 16's actual
minimum)
- Removed stale `**Documentation**: Integrated MDX documentation
support` feature line — MDX docs feature was removed
- Removed PostHog and Plain prerequisites (no longer relevant for local
setup)
- Removed "Database Setup" step pointing at a non-existent `/migrations`
folder; renumbered subsequent steps
- Removed two non-existent script references (`bun run db:types`, `bun
run db:migration`)
- Removed commented-out `<p align="center">…logo-circle.png…</p>` block
- Updated Project Structure section to match actual `src/` layout: added
`configs/`, `core/`, `trpc/`; removed non-existent `server/`; refreshed
descriptions

## Review & Testing Checklist for Human
- [ ] Verify no remaining references to `create-migration`,
`db:migrations`, `scripts:check-all-env`, MDX docs, Plain, or PostHog in
any docs you care about
- [ ] Confirm README setup steps still read correctly after renumbering
(c → Supabase Storage, d → Start dev server)
- [ ] Confirm Next.js 16 / Node 20.9+ versions are the ones you want
documented

### Notes
- `knip` reports 0 unused files and 0 unused dependencies after this
change (unchanged from main)
- Biome lint + format pass cleanly; pre-existing unit test failures are
unchanged
- Separately noted: `.github/workflows/sync-infra-specs.yml:76`
references stale paths (`src/types/*` instead of
`src/core/shared/contracts/*`) — left alone since fixing it changes
workflow behavior


Link to Devin session:
https://app.devin.ai/sessions/bf92d86408ce4a6496ae425d4a9a9ac5

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: ben@e2b.dev <ben@e2b.dev>
Co-authored-by: Alex Drankou <alex@e2b.dev>

Author: 3 people

README.md

@@ -1,10 +1,7 @@
-<!-- <p align="center">
-  <img width="100" src="/readme-assets/logo-circle.png" alt="e2b logo">
-</p> -->
 ![Dashboard Preview Dark](/readme-assets/dashboard-preview-dark.png#gh-dark-mode-only)
 ![Dashboard Preview Light](/readme-assets/dashboard-preview-light.png#gh-light-mode-only)
 
-# E2B Dashboard
+# Dashboard
 
 [![License](https://img.shields.io/badge/license-Apache--2.0-blue.svg)](LICENSE)
 [![Discord](https://img.shields.io/discord/1092455714431180995?color=7289DA&label=Discord&logo=discord&logoColor=white)](https://discord.com/channels/1092455714431180995)
@@ -17,26 +14,23 @@
 - 🤝 [Contributing Guide](CONTRIBUTING.md)
 
 ## Overview
-Our Dashboard is a modern, feature-rich web application built to manage and monitor E2B services. Built with Next.js 15 and React 19, it provides a seamless user experience for managing sandboxes, API keys, and usage analytics.
+Our Dashboard is a modern, feature-rich web application built to manage and monitor E2B services. Built with Next.js 16 and React 19, it provides a seamless user experience for managing sandboxes, API keys, and usage analytics.
 
 ## Features
-- **Modern Stack**: Built with Next.js 15, React 19, and TypeScript
+- **Modern Stack**: Built with Next.js 16, React 19, and TypeScript
 - **Real-time Analytics**: Monitor your sandbox usage and performance
 - **Authentication**: Secure authentication powered by Supabase
-- **Documentation**: Integrated MDX documentation support
 - **Type Safety**: Full TypeScript support throughout the codebase
 
 ## Getting Started
 
 > **Self-hosting Note**: If you're planning to self-host this dashboard, you'll likely want to self-host our infrastructure first. Please refer to our [infrastructure repository](https://github.com/e2b-dev/infra) for guidance on setting up the E2B platform on your own infrastructure.
 
 ### Prerequisites
-- Node.js 18+
+- Node.js 20.9+
 - Git
 - Vercel account
 - Supabase account
-- PostHog account (optional for analytics)
-- Plain account (optional for customer support)
 
 ### Local Development Setup
 
@@ -103,18 +97,11 @@ This project requires a Redis-compatible key-value store. You'll need to:
    {{ .SiteURL }}/api/auth/confirm?token_hash={{ .TokenHash }}&type=email&next={{ .RedirectTo }}&confirmation_url={{ .ConfirmationURL }}
    ```
 
-#### c. Database Setup
-1. Apply the database migrations manually:
-   - Navigate to the `/migrations` folder in the project
-   - Execute each SQL migration file in sequential order against your Supabase database
-   - You can run these migrations using the Supabase SQL Editor or a PostgreSQL client
-   - Make sure to apply migrations in the correct order based on their timestamp prefixes
-
-#### d. Supabase Storage Setup
+#### c. Supabase Storage Setup
 1. Go to Storage > Buckets
 2. Create a new **public** bucket named `profile-pictures`
 
-#### e. Start the development server
+#### d. Start the development server
 ```bash
 # Using Bun (recommended)
 bun run dev
@@ -138,8 +125,6 @@ bun run lint       # Run Biome linter
 bun run lint:fix   # Auto-fix Biome lint issues
 bun run format     # Format + organize imports with Biome
 bun run check      # Run full Biome check (lint + format + imports)
-SUPABASE_PROJECT_ID=your-project-id bun run db:types   # Generate DB types
-bun run db:migration # Create migration
 
 # All commands work with npm as well:
 npm run dev
@@ -149,13 +134,15 @@ npm run dev
 ### Project Structure
 ```
 src/
-├── app/          # Next.js app router pages
-├── features/     # Feature-specific components
-├── ui/           # Reusable UI components
-├── lib/          # Utility functions and shared logic
+├── app/          # Next.js App Router pages and layouts
+├── configs/      # Global constants, feature flags, and URL maps
+├── core/         # Server-side logic: actions, adapters, modules, and shared clients
+├── features/     # Domain-specific components (auth, dashboard, billing, etc.)
+├── lib/          # Utility functions, hooks, and shared helpers
 ├── styles/       # Global styles and Tailwind config
-└── types/        # TypeScript type definitions
-└── server/       # Server only logic & actions
+├── trpc/         # tRPC client and server setup
+├── types/        # TypeScript type definitions
+└── ui/           # Reusable UI primitives and Shadcn components
 tests/
 ├── unit/         # Vitest unit tests
 ├── integration/  # Vitest integration tests

package.json

@@ -16,9 +16,6 @@
     "prebuild": "bun scripts:check-app-env",
     "<<<<<<< Development Tools": "",
     "scan:local": "bunx react-scan@latest localhost:3000",
-    "<<<<<<< Database": "",
-    "db:migrations:create": "bun run scripts:create-migration",
-    "db:migrations:apply": "bun run scripts:apply-migrations",
     "<<<<<<< Gen": "",
     "generate:infra": "bunx openapi-typescript ./spec/openapi.infra.yaml -o ./src/core/shared/contracts/infra-api.types.ts",
     "generate:dashboard-api": "bunx openapi-typescript ./spec/openapi.dashboard-api.yaml -o ./src/core/shared/contracts/dashboard-api.types.ts",
@@ -27,16 +24,14 @@
     "<<<<<<< Scripts": "",
     "scripts:check-app-env": "bun scripts/check-app-env.ts",
     "scripts:check-playwright-env": "bun scripts/check-playwright-env.ts",
-    "scripts:check-all-env": "bun scripts:check-app-env",
-    "scripts:create-migration": "bun scripts/create-migration.ts",
     "<<<<<<< Development": "",
     "shad": "bunx shadcn@canary",
     "test:dev:traffic": "vitest run tests/development/traffic.test.ts",
     "test:dev:build": "vitest run tests/development/template-build.test.ts",
     "test:dev:events": "vitest run tests/development/sandbox-events.test.ts",
     "clean": "rm -rf .next node_modules && bun install",
     "<<<<<<< Testing": "",
-    "test:run": "bun scripts:check-all-env && vitest run",
+    "test:run": "bun scripts:check-app-env && vitest run",
     "test:integration": "bun scripts:check-app-env && vitest run tests/integration/",
     "test:unit": "vitest run tests/unit/",
     "e2e:install-browsers": "playwright install chromium --with-deps",
@@ -46,8 +41,8 @@
     "e2e:headed": "PLAYWRIGHT_MODE=dev bun scripts:check-playwright-env && PLAYWRIGHT_MODE=dev playwright test --headed",
     "knip": "knip",
     "knip:ci": "knip --include files,dependencies --reporter github-actions",
-    "test:watch": "bun scripts:check-all-env && vitest",
-    "test:ui": "bun scripts:check-all-env && vitest --ui",
+    "test:watch": "bun scripts:check-app-env && vitest",
+    "test:ui": "bun scripts:check-app-env && vitest --ui",
     "test:ui:integration": "bun scripts:check-app-env && vitest --ui tests/integration/"
   },
   "dependencies": {