Enabling LRU cache on docker-registry

config.yml

dev:
    # This assumes the Redis info are in environment variables
    cache:
        host: _env:REDIS_HOST
        port: _env:REDIS_PORT
        password: _env:REDIS_PASSWORD

redis.conf

# Enable 1GB of LRU cache on Redis
maxmemory 1gb
maxmemory-policy allkeys-lru