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Overview Build Ad Hoc Production Projects

Overview

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Billing

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Balance and billing

What would you like to build?

Model Effort

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Your apps

Saved to your account

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Browser briefs

Use a saved brief as your next app idea.

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New app

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Model Effort

Open preview ↗

Your app preview will appear here

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Source version

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Starts remaining this month: —

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History

Lifecycle webhook

Approved HTTPS relay URL

Saving replaces the signing key and clears previous deliveries.

Signing key · shown once

Copy this key to your receiver before closing history.

Terminal

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Search saved workspaces

New network

Network name

Start with a lowercase letter. Use lowercase letters, numbers, and hyphens.

Attach machine

Network Running machine Service name

Unique in this network. Use lowercase letters, numbers, and hyphens; start with a letter.

Application port (optional)

Register a port to receive HTTP at http://NAME.internal. Leave blank to only call services. Public previews are enabled separately.

New container

Name

Image

Startup command

Runs when the machine starts. Include everything needed to start your app from the image. Use an external database for durable data.

Machine size

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Build an image

Image name Load Dockerfile or Containerfile (optional) Dockerfile

Start with FROM mainbrella:base to keep terminal support. Single-stage Dockerfiles only, up to 16 KiB. Containers use a workspace shell; CMD and ENTRYPOINT do not start your app.

Build context (optional)

A .tar.gz archive up to 512 KiB for COPY instructions. Put files at the archive root and exclude secrets.

Your account includes 10 image builds per month, up to 5 minutes each, and 3 saved images. Failed builds count toward the allowance.

Build output

Save workspace

Name Stop container after saving

Pause file writes before saving. Files are saved; running processes do not resume on restore.

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