Update .env.testing to fix upstream bug

.env.testing

@@ -1,7 +1,7 @@
 APP_NAME="Pixelfed Test"
-APP_ENV="production"
+APP_ENV=local
 APP_KEY=base64:lwX95GbNWX3XsucdMe0XwtOKECta3h/B+p9NbH2jd0E=
-APP_DEBUG=false
+APP_DEBUG=true
 
 APP_URL=https://pixelfed.dev
 APP_DOMAIN="pixelfed.dev"