fix: resolve requirements installation failure by using local base.txt reference

[Copilot]

pip install -r requirements/dev.txt fails because dev.txt, prod.txt, and colab.txt all pull base.txt from a remote GitHub raw URL, which breaks in offline/restricted network environments.

Changes

• requirements/dev.txt, prod.txt, colab.txt: Replace remote URL reference with local relative path

- -r https://raw.githubusercontent.com/course-files/ServingMLModels/refs/heads/main/requirements/base.txt
+ -r base.txt

requirements/base.txt already exists in the repo — the remote reference was redundant and fragile.

Original prompt

(.venv) PS D:\BBIT\4.3\BI II labs\Serving ML Models\lab-on-serving-ml-models-202509-b> pip install -r requirements/dev.txt
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000023AF4D4A510>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /course-files/ServingMLModels/refs/heads/main/requirements/base.txt
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000023AF4D7CB90>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /course-files/ServingMLModels/refs/heads/main/requirements/base.txt
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000023AF4D7CE10>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /course-files/ServingMLModels/refs/heads/main/requirements/base.txt
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000023AF4D7D090>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /course-files/ServingMLModels/refs/heads/main/requirements/base.txt
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000023AF4D7D310>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /course-files/ServingMLModels/refs/heads/main/requirements/base.txt
ERROR: Could not install packages due to an OSError: HTTPSConnectionPool(host='raw.githubusercontent.com', port=443): Max retries exceeded with url: /course-files/ServingMLModels/refs/heads/main/requirements/base.txt (Caused by NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000023AF4D7D590>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))

[notice] A new release of pip is available: 25.3 -> 26.0.1
[notice] To update, run: python.exe -m pip install --upgrade pip
(.venv) PS D:\BBIT\4.3\BI II labs\Serving ML Models\lab-on-serving-ml-models-202509-b>

Created from VS Code.

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