Use database for REPL, update URL structure (sveltejs#2572)

* fix: move `shelljs` to dev-deps

* fix: move `codemirror` to “external” config only

* fix: move `yootils` to “external” config only

* chore: bump “sirv” dep

* chore: regenerate pkg-lock

* chore: add `.env.example` file

* chore: remove previous dependencies

* chore: add users migration

* feat: add `db` util w/ pool

* feat: handle GitHub OAuth directly, thru JWTs

* fix: hydrate `user` data & update keys

* fix: add timestamp columns to “users" table

* feat: save new gists to database

* feat: find & update gists

* fix: update client for new endpoints

* fix: always send { error } shape

* fix: rename “users.token” => "users.github_token”

* chore: include node-fetch as dev-dep

* fix: remove extra DATABASE_URL key

* fix: upload OAuth popup message

* chore: regenerate lock file

* add database entries for new gists, update REPL URLs

* implement saving and forking

* insert history entry when forking

* add logic for relaxed gists

* remove unnecessary on conflict clause

Author: lukeed

site/.env.example

@@ -0,0 +1,12 @@
+NODE_ENV=
+
+PORT=
+BASEURL=
+DATABASE_URL=
+GITHUB_CLIENT_ID=
+GITHUB_CLIENT_SECRET=
+MAPBOX_ACCESS_TOKEN=
+
+JWT_EXP=30d
+JWT_ALG=HS512
+JWT_KEY=

site/migrations/000-create-users.js

@@ -0,0 +1,25 @@
+exports.up = DB => {
+	DB.sql(`
+		create table if not exists users (
+			id serial primary key,
+			uid character varying(255) not null unique,
+			name character varying(255),
+			username character varying(255) not null,
+			avatar text,
+			github_token character varying(255),
+			created_at timestamp with time zone NOT NULL DEFAULT now(),
+			updated_at timestamp with time zone
+		);
+
+		create unique index if not exists users_pkey ON users(id int4_ops);
+		create unique index if not exists users_uid_key ON users(uid text_ops);
+	`);
+};
+
+exports.down = DB => {
+	DB.sql(`
+		drop table if exists users cascade;
+		drop index if exists users_uid_key;
+		drop index if exists users_pkey;
+	`);
+};

site/migrations/001-create-gists.js

@@ -0,0 +1,24 @@
+exports.up = DB => {
+	DB.sql(`
+		create table if not exists gists (
+			id serial primary key,
+			uid uuid NOT NULL DEFAULT gen_random_uuid(),
+			user_id integer REFERENCES users(id) not null,
+			name character varying(255) not null,
+			files json not null,
+			created_at timestamp with time zone NOT NULL DEFAULT now(),
+			updated_at timestamp with time zone
+		);
+
+		create unique index if not exists gists_pkey ON gists(id int4_ops);
+		create index if not exists gists_user_id_key ON gists(user_id int4_ops);
+	`);
+};
+
+exports.down = DB => {
+	DB.sql(`
+		drop table if exists gists cascade;
+		drop index if exists gists_user_id_key;
+		drop index if exists gists_pkey;
+	`);
+};