Fix #261 issue

[huiyan2021]

Description

os.getenv() returns a string if the environment variable has been set as shown below: MEGA_SERVICE_PORT = os.getenv("MEGA_SERVICE_PORT", 7778) which will cause TypeError: 'str' object cannot be interpreted as an integer

Issues

https://github.com/opea-project/GenAIExamples/issues/261

Type of change

List the type of change like below. Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds new functionality)
• [ ] Breaking change (fix or feature that would break existing design and interface)

Dependencies

Tests

Set the environment "MEGA_SERVICE_PORT" when starting codegen:

  codegen-xeon-backend-server:
    image: opea/codegen:latest
    container_name: codegen-xeon-backend-server
    depends_on:
      - llm
    ports:
      - "7778:7778"
    environment:
      - https_proxy=${https_proxy}
      - http_proxy=${http_proxy}
      - MEGA_SERVICE_HOST_IP=${MEGA_SERVICE_HOST_IP}
      - LLM_SERVICE_HOST_IP=${LLM_SERVICE_HOST_IP}
      - MEGA_SERVICE_PORT= 8000
    ipc: host
    restart: always

[chensuyue]

Description

The summary of the proposed changes as long as the relevant motivation and context.

Issues

List the issue or RFC link this PR is working on. If there is no such link, please mark it as n/a.

Type of change

List the type of change like below. Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds new functionality)
• [ ] Breaking change (fix or feature that would break existing design and interface)

Dependencies

List the newly introduced 3rd party dependency if exists.

Tests

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Please fill in the PR description correctly.

[huiyan2021]

Sorry, fixed PR description.