Scaffold full-stack volunteer scheduling application

Go backend with domain-based packages (volunteer, schedule, timeoff,
checkin, notification), SQLite storage, JWT auth, and chi router.
React TypeScript frontend with routing, auth context, and pages for
all core features. Multi-stage Dockerfile and docker-compose included.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

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+# Stage 1: Build React frontend
+FROM node:22-alpine AS frontend
+WORKDIR /app/web
+COPY web/package*.json ./
+RUN npm ci
+COPY web/ ./
+RUN npm run build
+
+# Stage 2: Build Go backend
+FROM golang:1.26-alpine AS backend
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -o /walkies ./cmd/server
+
+# Stage 3: Final image
+FROM alpine:3.21
+RUN apk add --no-cache ca-certificates tzdata
+WORKDIR /app
+COPY --from=backend /walkies ./walkies
+COPY --from=frontend /app/web/build ./web/dist
+EXPOSE 8080
+ENV STATIC_DIR=/app/web/dist
+CMD ["./walkies"]