Update Dockerfile.backend via Son of Anton

Dockerfile.backend

+FROM node:20-alpine AS base
+RUN apk add --no-cache libc6-compat openssl
+
+WORKDIR /app
+
+# Copy everything
+COPY package*.json ./
+COPY backend/package*.json ./backend/
+COPY shared/package*.json ./shared/
+COPY prisma/ ./prisma/
+
+# Install backend deps
+WORKDIR /app/backend
+RUN npm install --legacy-peer-deps
+
+# Copy source
+WORKDIR /app
+COPY shared/ ./shared/
+COPY backend/ ./backend/
+COPY prisma/ ./backend/prisma/
+
+# Generate Prisma
+WORKDIR /app/backend
+RUN npx prisma generate --schema=./prisma/schema.prisma
+
+# Build
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine AS runner
+RUN apk add --no-cache libc6-compat openssl
+WORKDIR /app
+
+COPY --from=base /app/backend/dist ./dist
+COPY --from=base /app/backend/node_modules ./node_modules
+COPY --from=base /app/backend/prisma ./prisma
+COPY --from=base /app/backend/package.json ./
+
+ENV NODE_ENV=production
+EXPOSE 3001
+
+CMD ["sh", "-c", "npx prisma migrate deploy --schema=./prisma/schema.prisma && node dist/main.js"]
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