title: redisson.yaml environment variable
body: <p>I am using Redisson with Spring-boot and I need to pass in an environment variable to redisson.yaml</p>
  
  <p><strong>address: "redis://${REDIS_HOST}:6379"</strong></p>
  
  <p>It's currently not working when passing environment variables.</p>
  
  <pre><code>---
  singleServerConfig:
    idleConnectionTimeout: 10000
    pingTimeout: 1000
    connectTimeout: 10000
    timeout: 3000
    retryAttempts: 3
    retryInterval: 1500
    password: null
    subscriptionsPerConnection: 5
    clientName: null
    address: "redis://${REDIS_HOST}:6379"
    subscriptionConnectionMinimumIdleSize: 1
    subscriptionConnectionPoolSize: 50
    connectionMinimumIdleSize: 32
    connectionPoolSize: 64
    database: 0
    dnsMonitoringInterval: 5000
  threads: 0
  nettyThreads: 0
  codec: !&lt;org.redisson.codec.JsonJacksonCodec&gt; {}
  transportMode: "NIO"
  </code></pre>