Update install instructions

[ocefpaf]

I'm going through the installation process again with @kbailey-noaa and we identified a few points to improve and/or fix:

• We really need a redirect on all notebook_demos page! Just got bamboozled by that myself when googling for the installation;
• Use Miniforge instead of Miniconda: https://github.com/conda-forge/miniforge/releases/tag/4.10.3-10 b/c that will simplify the channel configuration part and it will be on the safe side of the Anaconda Terms of conditions;
• Make sure curl is installed on Windows/base env so we can simplify all the instructions to copy-n-paste code from the site;
• Add a "remove-all-and-reinstall" note when facing update problems.

[MathewBiddle]

Also the instructions for removing the environment are:

conda env remove -name IOOS

when it should be

conda env remove --name IOOS

Thanks @dpsnowden for catching that one.

[MathewBiddle]

can we add an "if all else fails install from the lock file" section too?

[dpsnowden]

@MathewBiddle and @ocefpaf I just stumbled across this error in installing mamba forge and creating the environment. I was copy/pasting from the Create the IOOS conda environment

(base) ~ % mamba env create --quiet --file environment.yml


Encountered problems while solving:
  - nothing provides requested nco
  - nothing provides requested phantomjs

I found this issue on the mamba forge repo and it seems to have gone unaddressed. mamba-org/mamba#1145

For now I just deleted those two lines from the environment.yml file and it worked. Mamba was able to create the environment and I was able to activate these.

[ocefpaf]

Can you provide the results of mamba info and cat ~/.condarc?

[ocefpaf]

We revamped the install instructions a few times after this issue was opened. We can close this one and, if new issues show up, open a new one instead.