update v2 installation instructions page in docs

[kevingreenman]

Description

• added instructions for environment.yml
• updated docker instructions to remove references to release candidate (fixes [TODO]: update docker installation instructions in docs for stable release #827)
• updated PyPI instructions to remove --pre flag
• minor reorganization

[JacksonBurns]

We should comment on Python versions somewhere. This is currently suggesting 3.11 as the only real option (which it kinda is to get all the features), but we should explain why that is and mention what 3.12 can do.

[kevingreenman]

We should comment on Python versions somewhere. This is currently suggesting 3.11 as the only real option (which it kinda is to get all the features), but we should explain why that is and mention what 3.12 can do.

good point, can you remind me what things one can't do in 3.12?

[JacksonBurns]

3.12 can't install ray for hpopt, but that might he it... cc @hwpang was there anything else?

[hwpang]

Yeah as far as I know it's just ray tune doesn't support 3.12 yet

[shihchengli]

1. The torch-scatter is not a dependency, so the note in option 4 should be modified.
2. For Build Image Locally, maybe it would be great to keep the steps written in v1.
3. Idk if it is desirable to provide a GPU version Dockerfile.
4. I think instead of saying adding the --gpus all to docker run can allow Chemprop to run on GPU within the container, we can say the --gpus command line option is used to specify which GPU devices gonna be used.

[JacksonBurns]

Gpus in docker is non trivial. Requires extra system level software, manual configuration, etc... we have documented where people can start looking, but they have to do it themselves.

[kevingreenman]

1. The torch-scatter is not a dependency, so the note in option 4 should be modified.
2. For Build Image Locally, maybe it would be great to keep the steps written in v1.
3. Idk if it is desirable to provide a GPU version Dockerfile.
4. I think instead of saying adding the --gpus all to docker run can allow Chemprop to run on GPU within the container, we can say the --gpus command line option is used to specify which GPU devices gonna be used.

@shihchengli thanks for your feedback! I've addressed 1, 2, and 4. And I agree with @JacksonBurns about 3 - this would be nice to have, but I think it's too complicated for now.

[JacksonBurns]

@kevingreenman can you update the instructions for building locally that are in the dockerfile as well?

chemprop/Dockerfile

Lines 5 to 10 in 7ab28fe

	# Build this image with:
	# docker build .
	#
	# Run the built image with:
	# docker run --name chemprop_container -it <IMAGE_ID>
	# where <IMAGE_ID> is shown from the output of the build command.