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First of all you need to be able to run MAMP in port 80. This is a "heat check" if you don't have any process jamming http ports. You can check it like this:

sudo lsof | grep LISTEN

If you do happen to have any process with something like this *:http (LISTEN), you are in trouble. Before with adventure check if it isn't MAMP itself (yeah, you should close that beforehand)

ps <pid of that process>

If you don't see MAMP, you are in good hands, I have just the thing for you:

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

Working with git remotes on Heroku

Generally, you will add a git remote for your Heroku app during the Heroku app creation process, i.e. heroku create. However, if you are working on an existing app and want to add git remotes to enable manual deploys, the following commands may be useful.

Adding a new remote

Add a remote for your Staging app and deploy

Note that on Heroku, you must always use master as the destination branch on the remote. If you want to deploy a different branch, you can use the syntax local_branch:destination_branch seen below (in this example, we push the local staging branch to the master branch on heroku.

$ git remote add staging https://git.heroku.com/staging-app.git

Conventional Commit Messages

See how a minor change to your commit message style can make a difference.

Tip

Take a look at git-conventional-commits , a CLI util to ensure these conventions, determine version and generate changelogs

	# Aliases
	alias g='git'
	compdef g=git
	alias gst='git status'
	compdef _git gst=git-status
	alias gl='git pull'
	compdef _git gl=git-pull
	alias gup='git fetch && git rebase'
	compdef _git gup=git-fetch
	alias gp='git push'

	# Compiled source #
	###################
	*.com
	*.class
	*.dll
	*.exe
	*.o
	*.so

	# Packages #

	{
	"AF": "Afghanistan",
	"AX": "Aland Islands",
	"AL": "Albania",
	"DZ": "Algeria",
	"AS": "American Samoa",
	"AD": "Andorra",
	"AO": "Angola",
	"AI": "Anguilla",
	"AQ": "Antarctica",

	/*
	* Handling Errors using async/await
	* Has to be used inside an async function
	*/
	try {
	const response = await axios.get('https://your.site/api/v1/bla/ble/bli');
	// Success 🎉
	console.log(response);
	} catch (error) {
	// Error 😨

	type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;

	export function withAppContext<
	P extends { appContext?: AppContextInterface },
	R = Omit<P, 'appContext'>
	>(
	Component: React.ComponentClass<P> \| React.StatelessComponent<P>
	): React.SFC<R> {
	return function BoundComponent(props: R) {
	return (