Update backend/Dockerfile via Son of Anton

backend/Dockerfile

-# Stage 1: Build
-FROM node:20-alpine AS builder
+FROM node:20-alpine AS base
+RUN apk add --no-cache libc6-compat openssl
 
+# Install dependencies
+FROM base AS deps
 WORKDIR /app
+COPY package.json ./
+RUN npm install --legacy-peer-deps
 
-# Copy shared package first
-COPY ../shared /shared
+# Copy shared types
+FROM base AS shared
 WORKDIR /shared
-RUN npm install && npm run build 2>/dev/null || true
+COPY ../shared/package.json ./
+COPY ../shared/src ./src
+COPY ../shared/tsconfig.json ./
 
+# Build
+FROM base AS builder
 WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+COPY --from=shared /shared ../shared
 
-# Copy package files
-COPY package.json package-lock.json* ./
-
-# Install dependencies
-RUN npm ci --legacy-peer-deps
-
-# Copy prisma schema
+# Generate Prisma client
 COPY ../prisma ./prisma
-RUN npx prisma generate
-
-# Copy source
-COPY . .
+RUN npx prisma generate --schema=./prisma/schema.prisma
 
-# Build
 RUN npm run build
 
-# Stage 2: Production
-FROM node:20-alpine AS runner
-
+# Production
+FROM base AS runner
 WORKDIR /app
+ENV NODE_ENV=production
 
-# Install production deps only
-COPY package.json package-lock.json* ./
-RUN npm ci --legacy-peer-deps --production && npm cache clean --force
-
-# Copy built output
 COPY --from=builder /app/dist ./dist
-COPY --from=builder /app/node_modules/.prisma ./node_modules/.prisma
+COPY --from=builder /app/node_modules ./node_modules
 COPY --from=builder /app/prisma ./prisma
-
-# Create non-root user
-RUN addgroup --system --gid 1001 nodejs && \
-    adduser --system --uid 1001 nestjs
-USER nestjs
+COPY --from=builder /app/package.json ./
 
 EXPOSE 3001
 
-ENV NODE_ENV=production
-ENV PORT=3001
-
-CMD ["node", "dist/main.js"]
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+CMD ["sh", "-c", "npx prisma migrate deploy --schema=./prisma/schema.prisma && node dist/main.js"]
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