[Bug]: minor issues in docker docs

[bamaer]

Apache Hop version?

SNAPSHOT-20230216

Java version?

openjdk version "11.0.17" 2022-10-18

Operating system

Other

What happened?

https://hop.apache.org/tech-manual/latest/docker-container.html

• still refers to java 8 instead of 11
  OpenJDK version 8 is then used to execute Apache Hop.
• double port reference in the long-lived container section

docker run -it --rm \
  --env HOP_SERVER_USER=admin \
  --env HOP_SERVER_PASS=admin \
  --env HOP_SERVER_PORT=8181 \
  --env HOP_SERVER_PORT=8180 \
  --env HOP_SERVER_HOSTNAME=0.0.0.0 \
  -p 8181:8181 \
  -p 8180:8180 \
  --name my-hop-server-container \
 apache/hop:<tag>

Issue Priority

Priority: 1

Issue Component

Component: Documentation