mystmd-quickstart requires libwebp

[cbcunc]

Describe the bug

context When I install mystmd via conda-forge, then clone mystmd-quickstart and start myst...

expectation I expected myst to start cleanly.

bug But instead myst conplains about needing cwebp and gif2webp to convert images in the example site. Here's an error message I ran into...

(myst) user@host mystmd-quickstart % myst

Welcome to the MyST Markdown CLI!! 🎉 🚀

myst init walks you through creating a myst.yml file.

You can use myst to:

 - create interactive websites from markdown and Jupyter Notebooks 📈
 - build & export professional PDFs and Word documents 📄

Learn more about this CLI and MyST Markdown at: https://mystmd.org

✅ Project already initialized with config file: myst.yml
✅ Site already initialized with config file: myst.yml

? Would you like to run myst start now? Yes
📖 Built README.md in 31 ms.
📖 Built 01-paper.md in 31 ms.
📖 Built 02-notebook.ipynb in 28 ms.
⚠️  _build/site/public/citations-01c13a8e952550bf7ad0007c7d6f1c0f.png Could not convert from image _build/site/public/citations-01c13a8e952550bf7ad0007c7d6f1c0f.png to webp:
cwebp is required

⚠️  _build/site/public/equations-dad93b54bf18b479b68ab0a8384114fe.gif Could not convert from image _build/site/public/equations-dad93b54bf18b479b68ab0a8384114fe.gif to webp:
gif2webp is required

⚠️  _build/site/public/interactive-7251e78319202f81d4bea564a130d641.gif Could not convert from image _build/site/public/interactive-7251e78319202f81d4bea564a130d641.gif to webp:
gif2webp is required

⚠️  _build/site/public/structured-data-b3aa5d9e5ffd367aba4e8a4d9da1bb6c.gif Could not convert from image _build/site/public/structured-data-b3aa5d9e5ffd367aba4e8a4d9da1bb6c.gif to webp:
gif2webp is required

⚠️  _build/site/public/pdf-two-column-79f9f7d96e3ffac6ab995c03b7853f82.png Could not convert from image _build/site/public/pdf-two-column-79f9f7d96e3ffac6ab995c03b7853f82.png to webp:
cwebp is required

⚠️  _build/site/public/frontmatter-after-826e29e74b9eb9caf83ef34262c7cd16.png Could not convert from image _build/site/public/frontmatter-after-826e29e74b9eb9caf83ef34262c7cd16.png to webp:
cwebp is required

⚠️  _build/site/public/export-pdf-609cdc89df97c7998a23e2f17d53e6f5.png Could not convert from image _build/site/public/export-pdf-609cdc89df97c7998a23e2f17d53e6f5.png to webp:
cwebp is required

⚠️  _build/site/public/citations-01c13a8e952550bf7ad0007c7d6f1c0f.png Could not convert from image _build/site/public/citations-01c13a8e952550bf7ad0007c7d6f1c0f.png to webp:
cwebp is required

📚 Built 3 pages for project in 112 ms.

    ✨✨✨  Starting Book Theme  ✨✨✨

🔌 Server started on port 3000!  🥳 🎉

    👉  http://localhost:3000  👈

   ╭────────────────────────────────────────────╮
   │                                            │
   │     Update available! v1.1.50 ≫ v1.2.0     │
   │                                            │
   │   Run `pip install -U mystmd` to update.   │
   │                                            │
   │     Follow @MystMarkdown for updates!      │
   │      https://twitter.com/MystMarkdown      │
   │                                            │
   ╰────────────────────────────────────────────╯

problem This is a problem for people becoming acquainted with myst for the first time as it implies a buggy experience.

Reproduce the bug

mamba create -n myst nodejs
mamba activate myst
mamba install mystmd
git clone https://github.com/executablebooks/mystmd-quickstart.git
cd mystmd-quickstart
myst
Y

List your environment

# Name                    Version                   Build  Channel
bzip2                     1.0.8                h93a5062_5    conda-forge
ca-certificates           2024.2.2             hf0a4a13_0    conda-forge
giflib                    5.2.2                h93a5062_0    conda-forge
icu                       73.2                 hc8870d7_0    conda-forge
lerc                      4.0.0                h9a09cb3_0    conda-forge
libcxx                    16.0.6               h4653b0c_0    conda-forge
libdeflate                1.20                 h93a5062_0    conda-forge
libexpat                  2.6.2                hebf3989_0    conda-forge
libffi                    3.4.2                h3422bc3_5    conda-forge
libjpeg-turbo             3.0.0                hb547adb_1    conda-forge
libpng                    1.6.43               h091b4b1_0    conda-forge
libsqlite                 3.45.2               h091b4b1_0    conda-forge
libtiff                   4.6.0                h07db509_3    conda-forge
libuv                     1.48.0               h93a5062_0    conda-forge
libwebp                   1.3.2                hf30222e_1    conda-forge
libwebp-base              1.3.2                h93a5062_1    conda-forge
libzlib                   1.2.13               h53f4e23_5    conda-forge
mystmd                    1.1.50             pyh80e38bb_0    conda-forge
ncurses                   6.4.20240210         h078ce10_0    conda-forge
nodejs                    20.9.0               h3b52c9b_1    conda-forge
openssl                   3.3.0                h0d3ecfb_0    conda-forge
pip                       24.0               pyhd8ed1ab_0    conda-forge
python                    3.12.2          hdf0ec26_0_cpython    conda-forge
readline                  8.2                  h92ec313_1    conda-forge
setuptools                69.2.0             pyhd8ed1ab_0    conda-forge
tk                        8.6.13               h5083fa2_1    conda-forge
tree                      2.1.1                hb547adb_0    conda-forge
tzdata                    2024a                h0c530f3_0    conda-forge
wheel                     0.43.0             pyhd8ed1ab_1    conda-forge
xz                        5.2.6                h57fd34a_0    conda-forge
zlib                      1.2.13               h53f4e23_5    conda-forge
zstd                      1.5.5                h4f39d0f_0    conda-forge

[welcome[bot]]

Thanks for opening your first issue here! Engagement like this is essential for open source projects! :hugs:
If you haven't done so already, check out EBP's Code of Conduct. Also, please try to follow the issue template as it helps other community members to contribute more effectively.
If your issue is a feature request, others may react to it, to raise its prominence (see Feature Voting).
Welcome to the EBP community! :tada: