Fix TB setup

[georgimld]

Checklist

• I have followed (at least) the PR section of the contributing guide.
• I fixed all necessary PR warnings
• The commit history is clean
• The E2E tests are passing
• If possible, the issue has been divided into more subtasks
• I did a self review before requesting a review from another team member

Description

The operation script and the docker-compose setup were not working when a volume was attached to the blockchain container, since TB v2.1.0, with an error like:

terminate called after throwing an instance of 'boost::filesystem::filesystem_error'\n what(): boost::filesystem::create_directory: Permission denied: \"/root/.multichain/TrubudgetChain\"\n","message":"Failed to start the alpha node: "

Todo

• The fix included granting permissions to the node user in the blockchain dockerfile
• setting the correct environment variable as MULTICHAIN_DIR=/root
• correctly using volumes in the operations docker-compose

How to test

• check out branch 1330-fix-operation-script
• using the operations script: make sure to build the blockchain image locally, for this you must edit one line in the docker-compose file in the /operation folder. This must be edited to build: ../../blockchain. Then you can run bash ../scripts/operation/start-trubudget.sh --slim
• using the docker-compose setup: cd docker-compose and then docker-compose --project-directory . -f blockchain/docker-compose.alphanode.yml -f blockchain/persistence.docker-compose.yml -f blockchain/local-build.docker-compose.yml up

Closes #1330

[openkfwCI]

	Notes	Time
✅	Note for Reviewer: E2E tests on remote server succeeded	Tue, 11 Apr 2023 07:36:46 +0000

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