ci: minor tweaks to args and env

Dockerfile

@@ -21,11 +21,10 @@ FROM ${REGISTRY}/bun:1.3.10-alpine3.22 AS runtime
 WORKDIR /app
 COPY --from=prod-deps /app/node_modules /app/node_modules
 COPY --from=build /app/dist /app/dist
-COPY --from=builder /app/package.json ./
 
 ARG APP_VERSION=latest
-ARG APP_VERSION
 
+ENV NODE_ENV=production
 ENV HOST=0.0.0.0
 ENV PORT=4321