Yarn command "develop" not found

Question

For reference, the goal is to design a blog website on github using .mdx format.

I'm trying to run a prebuilt docker container (I did not compose the image) using an M1 Mac. For ambiguity's sake - let's say the container image is called "docker run -it -p "8881:8000" -v "$PWD:/app" "xxxxxxxx/yyy-zzz-purpose-of-container". One of the container dependencies is yarn, as can be seen from the output. Also, the yarn command "develop" is erroring as not found. Aside from the seemingly inocuous license output, the CLI displays:

warning package.json: No license field error Command "develop" not found.

I then tried to run it natively without the docker image as a node.js sequence of commands, and received the same error.

nvm install --lts="Gallium"
nvm alias default 'lts/Gallium'
npm install -g npm
npm install -g gatsby-cli
npm install -g yarn

yarn install .

yarn run develop

I get the same error as with the container.