Ensure shared schema is compiled for production deployment

Update Dockerfile and build process to compile shared/schema.ts using esbuild and copy the resulting schema.js to the production image.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ceced2fc-aa46-458d-ba87-ddd4b7bb1518
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/659922a9-0087-461c-90dd-6d9a58b81d4d/ceced2fc-aa46-458d-ba87-ddd4b7bb1518/SBF5OKZ

Dockerfile

@@ -21,6 +21,9 @@ RUN npm run build
 RUN npx esbuild server/index.ts server/routes.ts server/storage.ts server/db.ts server/static.ts \
     --platform=node --packages=external --format=esm --outdir=dist
 
+# Build shared schema file
+RUN npx esbuild shared/schema.ts --platform=node --packages=external --format=esm --outdir=shared
+
 # Production stage
 FROM base AS production
 
@@ -29,7 +32,7 @@ COPY --from=dependencies /tmp/prod_node_modules ./node_modules
 
 # Copy built application
 COPY --from=build /app/dist ./dist
-COPY --from=build /app/shared ./shared
+COPY --from=build /app/shared/schema.js ./shared/
 COPY --from=build /app/drizzle.config.ts ./
 COPY --from=build /app/package.json ./