Refactor Study Desk application structure

Dockerfile

@@ -1,11 +1,19 @@
+# ---- base ----
+FROM node:22-slim AS base
+RUN apt-get update -y && apt-get install -y openssl && rm -rf /var/lib/apt/lists/*
+
 # ---- deps ----
-FROM node:22-slim AS deps
+FROM base AS deps
 WORKDIR /app
 COPY package.json package-lock.json ./
-RUN npm install
+RUN npm ci
+
+# ---- production dependencies ----
+FROM deps AS runtime-deps
+RUN npm prune --omit=dev
 
 # ---- builder ----
-FROM node:22-slim AS builder
+FROM base AS builder
 WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
@@ -13,13 +21,13 @@ RUN npx prisma generate
 RUN npm run build
 
 # ---- runner ----
-FROM node:22-slim AS runner
+FROM base AS runner
 WORKDIR /app
 ENV NODE_ENV=production
 ENV PORT=3726
+ENV HOSTNAME=0.0.0.0
 ENV DATABASE_URL="file:/app/data/study.db"
 
-RUN apt-get update -y && apt-get install -y openssl && rm -rf /var/lib/apt/lists/*
 RUN useradd --system --create-home appuser && mkdir -p /app/data && chown -R appuser:appuser /app
 
 COPY --from=builder /app/.next/standalone ./
@@ -27,10 +35,13 @@ COPY --from=builder /app/.next/static ./.next/static
 COPY --from=builder /app/public ./public
 COPY --from=builder /app/prisma ./prisma
 COPY --from=builder /app/prisma.config.ts ./
-RUN npm install prisma@^7.8.0
+COPY --from=builder /app/scripts ./scripts
+COPY --from=runtime-deps /app/node_modules ./node_modules
 COPY docker-entrypoint.sh ./
 RUN chmod +x docker-entrypoint.sh
 # Running as root to avoid permission denied on Unraid host-mounted volumes
 EXPOSE 3726
 VOLUME ["/app/data"]
+HEALTHCHECK --interval=10s --timeout=5s --start-period=20s --retries=6 \
+  CMD ["node", "-e", "fetch('http://127.0.0.1:3726/api/health').then(r=>{if(!r.ok)process.exit(1)}).catch(()=>process.exit(1))"]
 ENTRYPOINT ["./docker-entrypoint.sh"]