Deploying to Heroku via Git

WHAT IT TESTS: how a git-based PaaS turns a push into a running app. ANSWER OUTLINE: you commit code plus manifest files, add the platform git remote, and push; the buildpack detects the language from files like requirements.txt or package.json, installs dependencies, compiles a slug, and starts the process named in the Procfile. Mention config vars for secrets and a runtime version file. RED FLAG: not knowing which file declares dependencies versus the start command, or putting credentials in the repo instead of config vars.