Update Dockerfile

1 job for master in 8 minutes and 1 second
Status Job ID Name Coverage
  Build And Push
failed #12904
build-and-push-job

00:08:01

 
Name Stage Failure
failed
build-and-push-job Build And Push
Collecting numpy
Downloading https://files.pythonhosted.org/packages/e7/38/f14d6706ae4fa327bdb023ef40b4d902bccd314d886fac4031687a8acc74/numpy-1.18.3-cp37-cp37m-manylinux1_x86_64.whl (20.2MB)
Collecting r-irkernel
Could not find a version that satisfies the requirement r-irkernel (from versions: )
No matching distribution found for r-irkernel
You are using pip version 10.0.1, however version 20.1b1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
error building image: error building stage: failed to execute command: waiting for process to exit: exit status 1
ERROR: Job failed: command terminated with exit code 1