set correct hosts for docker

.env.example.docker

@@ -0,0 +1,53 @@
+APP_NAME="Pixelfed Prod"
+APP_ENV=production
+APP_KEY=
+APP_DEBUG=false
+
+APP_URL=http://localhost
+APP_DOMAIN="localhost"
+ADMIN_DOMAIN="localhost"
+SESSION_DOMAIN="localhost"
+SESSION_SECURE_COOKIE=true
+TRUST_PROXIES="*"
+
+LOG_CHANNEL=stack
+
+DB_CONNECTION=mysql
+DB_HOST=db
+DB_PORT=3306
+DB_DATABASE=pixelfed
+DB_USERNAME=pixelfed
+DB_PASSWORD=pixelfed
+
+BROADCAST_DRIVER=log
+CACHE_DRIVER=redis
+SESSION_DRIVER=redis
+QUEUE_DRIVER=redis
+
+REDIS_SCHEME=tcp
+REDIS_HOST=redis
+REDIS_PASSWORD=null
+REDIS_PORT=6379
+
+MAIL_DRIVER=log
+MAIL_HOST=smtp.mailtrap.io
+MAIL_PORT=2525
+MAIL_USERNAME=null
+MAIL_PASSWORD=null
+MAIL_ENCRYPTION=null
+MAIL_FROM_ADDRESS="pixelfed@example.com"
+MAIL_FROM_NAME="Pixelfed"
+
+OPEN_REGISTRATION=true
+ENFORCE_EMAIL_VERIFICATION=true
+PF_MAX_USERS=1000
+
+MAX_PHOTO_SIZE=15000
+MAX_CAPTION_LENGTH=150
+MAX_ALBUM_LENGTH=4
+
+ACTIVITY_PUB=false
+AP_REMOTE_FOLLOW=false
+AP_INBOX=false
+PF_COSTAR_ENABLED=false
+