Add CARDANO_NODE_RTS_OPTIONS env to docker image

[ch1bo]

This allows to set Haskell RTS options through the docker image by providing an environment variable on a docker run command.

For example:

docker run --rm -it -e CARDANO_NODE_RTS_OPTIONS="-N" cardano-node run

will start the node with RTS option -N (utilizing all cores):

Running the cardano node ...
CARDANO_BIND_ADDR=0.0.0.0
CARDANO_BLOCK_PRODUCER=false
CARDANO_CONFIG=/opt/cardano/config/mainnet-config.json
CARDANO_DATABASE_PATH=/opt/cardano/data
CARDANO_LOG_DIR=/opt/cardano/logs
CARDANO_PORT=3001
CARDANO_SOCKET_PATH=/opt/cardano/ipc/socket
CARDANO_TOPOLOGY=/opt/cardano/config/mainnet-topology.json
CARDANO_NODE_RTS_OPTIONS=-N
cardano-node run --config /opt/cardano/config/mainnet-config.json --topology /opt/cardano/config/mainnet-topology.json --database-path /opt/cardano/data --socket-path /opt/cardano/ipc/socket --host-addr 0.0.0.0 --port 3001 +RTS -N -RTS

Related issues (asking for more or less cpu usage, although unclear whether the docker image is used): #5330 and #5500

Checklist

• Commit sequence broadly makes sense and commits have useful messages
• New tests are added if needed and existing tests are updated.
  • No tests about docker image found
• Any changes are noted in the CHANGELOG.md for affected package
  • The cadano-node/changelog.md seems VERY outdated on master?
• The version bounds in .cabal files are updated
  • Not needed
• CI passes. See note on CI. The following CI checks are required:
  • N/A
• Self-reviewed the diff

[github-actions]

This PR is stale because it has been open 45 days with no activity.

[github-actions]

This PR is stale because it has been open 45 days with no activity.

[angerman]

Can see a reason not to do this.

[ch1bo]

@angerman I assume you meant "can not see a reason not to do it" given your approval