Restore README

README.md

@@ -10,19 +10,38 @@ Like heroku pg:psql but for any Postgres database
 
 <!-- toc -->
 * [Usage](#usage)
+* [Commands](#commands)
 <!-- tocstop -->
 # Usage
 <!-- usage -->
 ```sh-session
-$ npm install -g heroku-plugin-psql
-$ oclif-example COMMAND
-running command...
-$ oclif-example (-v|--version|version)
-heroku-plugin-psql/0.0.2 linux-x64 node-v13.8.0
-$ oclif-example --help [COMMAND]
+$ yarn add --global heroku-plugin-psql
+$ heroku psql --app example-app
+--> Connecting to DATABASE_URL
+DATABASE=> help
+You are using psql, the command-line interface to PostgreSQL.
+Type:  \copyright for distribution terms
+       \h for help with SQL commands
+       \? for help with psql commands
+       \g or terminate with semicolon to execute query
+       \q to quit
+DATABASE=> \q
+$ heroku psql --help
+Like heroku pg:psql but for non-Heroku databases
+
 USAGE
-  $ oclif-example COMMAND
-...
+  $ heroku psql [DATABASE]
+
+OPTIONS
+  -a, --app=app        (required) app to run command against
+  -r, --remote=remote  git remote of app to use
+  --command=command    like --command (-c) in psql, runs single command and exits
+  --file=file          like --file (-f) in psql, runs commands from a file and exits
+
+EXAMPLE
+  $ heroku psql -a sushi
+       DATABASE=> 
+
 ```
 <!-- usagestop -->