Deploy heroku database. [skip ci]

.env.heroku

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+APP_ENV=production
+APP_DEBUG=false
+APP_FORCE_SSL=false
+APP_FORCE_ROOT=
+APP_KEY=SomeRandomStringOf32CharsExactly
+APP_LOG=errorlog
+APP_LOG_LEVEL=debug
+APP_URL=http://localhost
+
+DB_CONNECTION=sqlite
+DB_HOST=127.0.0.1
+DB_PORT=3306
+DB_USERNAME=homestead
+DB_PASSWORD=secret
+
+BROADCAST_DRIVER=log
+CACHE_DRIVER=file
+SESSION_DRIVER=file
+QUEUE_DRIVER=sync
+
+COOKIE_PATH="/"
+COOKIE_DOMAIN=
+COOKIE_SECURE=false
+
+REDIS_HOST=127.0.0.1
+REDIS_PASSWORD=null
+REDIS_PORT=6379
+
+MAIL_DRIVER=smtp
+MAIL_HOST=mailtrap.io
+MAIL_PORT=2525
+MAIL_FROM=changeme@example.com
+MAIL_USERNAME=null
+MAIL_PASSWORD=null
+MAIL_ENCRYPTION=null
+
+SEND_REGISTRATION_MAIL=true
+SEND_ERROR_MESSAGE=true
+SHOW_INCOMPLETE_TRANSLATIONS=false
+
+CACHE_PREFIX=firefly
+
+EXCHANGE_RATE_SERVICE=fixerio
+
+GOOGLE_MAPS_API_KEY=
+ANALYTICS_ID=
+SITE_OWNER=mail@example.com
+USE_ENCRYPTION=true
+
+PUSHER_KEY=
+PUSHER_SECRET=
+PUSHER_APP_ID=
+
+DEMO_USERNAME=
+DEMO_PASSWORD=
+