Update to X in STEP and README.md

Adding setup.sh from the codespace!

Update to 4 in STEP and README.md

Update devcontainer.json

Update devcontainer.json

Update to 3 in STEP and README.md

add devcontainer

Update to 2 in STEP and README.md

Adding hello from the codespace!

Update to 1 in STEP and README.md

Initial commit