Update heroku.md

Add required db migration and config setup

Update heroku.md

Added headers and server restart.
Fixing broken configuration link
[TASK] Update admin webapp version
[FEATURE] Default WEBAPP config to true.
[FEATURE] Added global export of sequelize.js to enable the ability to create transactions when persisting to the database.
[TASK] Implement Bridge resource controller

[FEATURE] DRY Resources CRUD router.

[TASK] Remove whitespace.

[FIX] Syntax error.
[FEATURE] Add gatewayd-setup-wizard-plugin to dependencies.

[TASK] Add commented out wizard plugin to Gatewaydfile.

[FIX] Bump wizard patch version.
[FEATURE] Add address, type to external_accounts.

[FEATURE] No longer require externalAccount.name.

[TEST] external accounts database table

[TEST] external accounts database table

[TASK] store fixture in a variable for redability

[TASK] db migration for not requiring name

[TASK] add white extra line
[FIX] Use actual destination issuer not cold wallet.
[FEATURE] Auto-set LAST_PAYMENT_HASH if not in config.

[FOLD] Start at hash if LAST_PAYMENT_HASH if config.
[TASK] add bluebird npm dependency
[FIX] add destination tag if there is any
[TEST] assert for sent not successed on _confirmSuccessfulPayment
Merge branch 'master' of github.com:ripple/gatewayd
[TASK] Update release notes and package.json.
[TASK] Bump admin webapp minor version.

[TASK] Rename admin-webapp dependency in package.json

[TASK] bump admin webapp patch version.
[TASK] Change config/config.js to config/enviornment.js to dissuade user from editing default configuration

[TASK] Change to environment.js for fetch_last_payment_hash.js

[FIX] Switch path for typo.
[TASK] New database configuration scheme. (backwards compatible)

[TASK] Fix reference error and format.
[FEATURE] Add enqueue_outgoing_payment CLI command.

[FIX] Switch path for typo.

[TASK] New database configuration scheme. (backwards compatible)

[TASK] Fix reference error and format.

[FEATURE] Add enqueue_outgoing_payment CLI command.

[FIX] Bump wizard patch version.

[TASK] Update release notes.
Merge pull request #344 from ripple/release-3.29.0-rc1

looks good to me