Add experimental .env for test purposes.

.env.testing

@@ -0,0 +1,26 @@
+APP_ENV=testing
+APP_DEBUG=true
+SITE_OWNER=mail@example.com
+APP_KEY=TestTestTestTestTestTestTestTest
+DEFAULT_LANGUAGE=en_US
+DEFAULT_LOCALE=equal
+TZ=Europe/Amsterdam
+LOG_CHANNEL=stdout
+APP_LOG_LEVEL=debug
+AUDIT_LOG_LEVEL=info
+AUDIT_LOG_CHANNEL=audit_stdout
+DB_CONNECTION=sqlite
+CACHE_DRIVER=array
+SESSION_DRIVER=array
+MAIL_MAILER=log
+SEND_ERROR_MESSAGE=true
+ENABLE_EXTERNAL_MAP=false
+ENABLE_EXTERNAL_RATES=true
+AUTHENTICATION_GUARD=web
+ALLOW_WEBHOOKS=true
+APP_NAME=FireflyIII
+BROADCAST_DRIVER=log
+QUEUE_DRIVER=sync
+CACHE_PREFIX=firefly
+FIREFLY_III_LAYOUT=v1
+APP_URL=http://localhost