1. Follow the upgrade instructions. 
2. Stop the remoteaccess Docker container:

docker stop remoteaccess

3. Back up the server.xml file allowing the VM Access Proxy to install the new server.xml:

sudo mv /var/data/conf/server.xml /var/data/conf/server.xml.pre_3.8

4. Start the remoteaccess Docker container: 

docker start remoteaccess

5. Check if the keystore password is present in server.xml.pre_3.8:

sudo grep 'keystorePass=' /var/data/conf/server.xml.pre_3.8

6. The output of the previous step displays the keystore password like so:

keystorePass="myKeystorePassword"

7.   Working from /var/data/conf open the server.xml file using the nano editor: 

 sudo nano server.xml

8. In the Connector section, locate the element that contains the keystorefile attribute. Add the following line, with the keystore password recorded in step 6. For example:

<!-- Define a SSL HTTP/1.1 Connector on port 443 -->

  <Connector SSLEnabled="true" clientAuth="false" keystoreFile="${catalina.home}/conf/keystore"

  keystorePass="myKeystorePassword"

  maxThreads="150" port="8443" protocol="HTTP/1.1" scheme="https" secure="true"

  sslProtocol="TLS"

  sslEnabledProtocols="TLSv1,TLSv1.1,TLSv1.2"

  ciphers="TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA"

  />

9. Restart the remoteaccess Docker container to pick up the keystore password: 

docker stop remoteaccess; docker start remoteaccess