app.json

{
  "name": "Mastodon",
  "description": "A GNU Social-compatible microblogging server",
  "repository": "https://github.com/mastodon/mastodon",
  "logo": "https://github.com/mastodon.png",
  "env": {
    "HEROKU": {
      "description": "Leave this as true",
      "value": "true",
      "required": true
    },
    "LOCAL_DOMAIN": {
      "description": "The domain that your Mastodon instance will run on (this can be appname.herokuapp.com or a custom domain)",
      "required": true
    },
    "SECRET_KEY_BASE": {
      "description": "The secret key base",
      "generator": "secret"
    },
    "OTP_SECRET": {
      "description": "One-time password secret",
      "generator": "secret"
    },
    "SINGLE_USER_MODE": {
      "description": "Should the instance run in single user mode? (Disable registrations, redirect to front page)",
      "value": "false",
      "required": true
    },
    "S3_ENABLED": {
      "description": "Should Mastodon use Amazon S3 for storage? This is highly recommended, as Heroku does not have persistent file storage (files will be lost).",
      "value": "true",
      "required": false
    },
    "S3_BUCKET": {
      "description": "Amazon S3 Bucket",
      "required": false
    },
    "S3_REGION": {
      "description": "Amazon S3 region that the bucket is located in",
      "required": false
    },
    "AWS_ACCESS_KEY_ID": {
      "description": "Amazon S3 Access Key",
      "required": false
    },
    "AWS_SECRET_ACCESS_KEY": {
      "description": "Amazon S3 Secret Key",
      "required": false
    },
    "SMTP_SERVER": {
      "description": "Hostname for SMTP server, if you want to enable email",
      "required": false
    },
    "SMTP_PORT": {
      "description": "Port for SMTP server",
      "required": false
    },
    "SMTP_LOGIN": {
      "description": "Username for SMTP server",
      "required": false
    },
    "SMTP_PASSWORD": {
      "description": "Password for SMTP server",
      "required": false
    },
    "SMTP_DOMAIN": {
      "description": "Domain for SMTP server. Will default to instance domain if blank.",
      "required": false
    },
    "SMTP_FROM_ADDRESS": {
      "description": "Address to send emails from",
      "required": false
    },
    "SMTP_AUTH_METHOD": {
      "description": "Authentication method to use with SMTP server. Default is 'plain'.",
      "required": false
    },
    "SMTP_OPENSSL_VERIFY_MODE": {
      "description": "SMTP server certificate verification mode. Defaults is 'peer'.",
      "required": false
    },
    "SMTP_ENABLE_STARTTLS_AUTO": {
      "description": "Enable STARTTLS if SMTP server supports it? Default is true.",
      "required": false
    }
  },
  "buildpacks": [
    {
      "url": "https://github.com/heroku/heroku-buildpack-apt"
    },
    {
      "url": "heroku/ruby"
    }
  ],
  "scripts": {
    "postdeploy": "bundle exec rails db:migrate && bundle exec rails db:seed"
  },
  "addons": [
    "heroku-postgresql",
    "heroku-redis"
  ]
}