update base ubuntu image in Dockerfile

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What does this pull request do? Explain your changes. (required)

Update go-livepeer to use ubuntu 22.04 in base image. Ubuntu 22.04 security maintenance expires in April 2027.

I tested on my test gateway and locally noting no issues but more testing should be done.

Should we bump to cuda 12.8 to add Blackwell support? There is no need transcoding related for Blackwell support yet.

Note minimum driver requirements:

Specific updates (required)

• updated Dockerfile and Dockerfile.base
• added regular cuda path to CPATH, LIBRARY_PATH and CGO_LDFLAGS to enable building without the livepeerci version of the base image

How did you test each of these updates (required)

Does this pull request close any open issues?

Checklist:

• Read the contribution guide
• make runs successfully
• All tests in ./test.sh pass
• README and other documentation updated
• Pending changelog updated

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 32.90540%. Comparing base (507a543) to head (76950de).

Additional details and impacted files

@@                 Coverage Diff                 @@
##              master       #3600         +/-   ##
===================================================
+ Coverage   32.88638%   32.90540%   +0.01902%     
===================================================
  Files            171         171                 
  Lines          42063       42063                 
===================================================
+ Hits           13833       13841          +8     
+ Misses         27189       27178         -11     
- Partials        1041        1044          +3     

see 1 file with indirect coverage changes

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see 1 file with indirect coverage changes

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[leszko]

Fine with me, but I see the CI build is failing.

[leszko]

Fine with me, but I see the CI build is failing.

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How is the livepeerci/cuda:12.6.3-cudnn-devel-ubuntu22.04 created? I updated the Dockerfile.cuda-base but it does not seem to be creating it?

[leszko]

How is the livepeerci/cuda:12.6.3-cudnn-devel-ubuntu22.04 created? I updated the Dockerfile.cuda-base but it does not seem to be creating it?

This is the instruction:

go-livepeer/docker/Dockerfile.cuda-base

Line 1 in 280ea4d

# livepeerci/cuda:12.0.0-cudnn8-devel-ubuntu20.04

Do you have access to push into Docker Hub livepeerci? If not, I can build and push the new image. Let me know