Buck converter, Class AB amplifier, AM radio receiver, Dickson
charge pump, transmission line signal integrity, 4th-order
Sallen-Key filter, and Colpitts RF oscillator. Multi-cell
notebooks with engineering narratives and multiple simulation
views per circuit.
Vite inlines import.meta.env.PUBLIC_* at build time, not runtime.
Without this, the frontend falls back to localhost:8099 which doesn't
exist from the browser. Empty string means same-origin requests,
letting Caddy route /api/* to the backend.
Bind mounts inherit host UID which conflicts with the container's
non-root user. Named volumes are initialized from the image layer,
preserving the chown from the Dockerfile.
Pre-create /app/notebooks/{user,examples} with correct ownership
before switching to the spicebook user. Without this, the app crashes
with PermissionError when it tries to create these directories at
runtime.
Update frontend Dockerfile prod stage from Caddy static to Node.js
running Astro SSR server. Configure caddy-docker-proxy labels to
route /api/* to backend and everything else to frontend on the same
domain. Support empty PUBLIC_API_URL for same-origin API calls.
Document architecture, features, quick start, file format, API
endpoints, configuration, roadmap, and tech stack. Include screenshots
of the notebook with AC Bode plot and transient step response.
Switch from query-param routing (/notebook/?id=X) to Astro dynamic
routes (/notebook/rc-lowpass-filter). Add @astrojs/node adapter with
output: 'server' for on-demand route handling.
Fix formatEng/formatAxisValue crash on null values passed by uPlot
axis tick formatters. Add CORS origin for port 4322.
