SYNAPSE_HTTP_PORT is not replaced in generated config file

[matrixbot]

This issue has been migrated from #12396.

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Description

While config generation, the SYNAPSE_HTTP_PORT is not replaced. Consequently the port is always 8008.

Steps to reproduce

• Run the following command

  docker run -it --rm \
  --mount type=volume,src=synapse-data,dst=/data \
  -e SYNAPSE_SERVER_NAME=testserver \
  -e SYNAPSE_HTTP_PORT=1234 \
  -e SYNAPSE_REPORT_STATS=no \
  matrixdotorg/synapse:latest generate
  

• Check the generated homeserver.yaml file

Version information

• Homeserver: -

If not matrix.org:

• Version: v1.55.2

• Install method: Kustomize

• Platform: Kubernetes 1.20+