Fix Docker build: add native deps for bcrypt, simplify vite config

- Add python3/make/g++ to Alpine for bcrypt native compilation
- Remove Socket.IO vite plugin (uses SvelteKit aliases unavailable at config level)
- Use prisma db push instead of migrate deploy for initial setup

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

Dockerfile

@@ -1,6 +1,8 @@
 # Stage 1: Build
 FROM node:22-alpine AS builder
 
+RUN apk add --no-cache python3 make g++
+
 WORKDIR /app
 
 COPY package.json package-lock.json ./
@@ -15,6 +17,8 @@ RUN npm run build
 # Stage 2: Production
 FROM node:22-alpine
 
+RUN apk add --no-cache python3 make g++
+
 WORKDIR /app
 
 COPY package.json package-lock.json ./
@@ -26,8 +30,9 @@ RUN npx prisma generate
 COPY --from=builder /app/build ./build
 COPY --from=builder /app/server.js ./server.js
 
+RUN apk del python3 make g++ && rm -rf /var/cache/apk/*
 RUN mkdir -p /app/uploads
 
 EXPOSE 3000
 
-CMD ["sh", "-c", "npx prisma migrate deploy && node server.js"]
+CMD ["sh", "-c", "npx prisma db push --skip-generate && node server.js"]