How can I use Digital Ocean app platform with PHP 8.2

I have a Symfony project, and I want to deploy it using the Digital Ocean app platform, I tried buildpack-php, but not support PHP 8.2 also I tried Dockerfile solution the build passed but the deployment step field

my Dockerfile:

FROM composer:2.5.8 AS _composer
_
FROM node:18.17.1-alpine3.18 AS _pnpm
_WORKDIR /app
ENV _PNPM_HOME_="/pnpm"
ENV _PATH_="$_PNPM_HOME_:$_PATH_"
RUN corepack enable
COPY "package.json" "pnpm-lock.yaml" "webpack.config.js" "postcss.config.js" "tailwind.config.js" "tsconfig.json" ./

FROM php:8.2-fpm-alpine3.18 as _base
_WORKDIR /app
COPY . .
COPY --from=_composer_ /usr/bin/composer /usr/bin/composer
RUN docker-php-ext-install bcmath \
    && apk add --no-cache icu-dev \
    && docker-php-ext-install intl
RUN apk add bash

FROM base AS _vendor
_RUN APP_ENV=prod APP_DEBUG=0 composer install --no-dev --optimize-autoloader \
    && APP_ENV=prod APP_DEBUG=0 php bin/console cache:clear

FROM pnpm AS _prod-deps
_RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --prod --frozen-lockfile

FROM pnpm AS _build
_COPY --from=_vendor_ /app/vendor /app/vendor
COPY --from=_base_ /app/assets /app/assets
RUN --mount=type=cache,id=pnpm,target=/pnpm/store pnpm install --frozen-lockfile
RUN pnpm build

FROM base AS _buildpack
_RUN apk add git \
    && mkdir "./buildpack" \
    && git clone https://github.com/heroku/heroku-buildpack-php.git ./buildpack

FROM base
COPY --from=_base_ /app /app
COPY --from=_prod-deps_ /app/node_modules /app/node_modules
COPY --from=_vendor_ /app/vendor /app/vendor
COPY --from=_build_ /app/public/assets /app/public/assets
COPY --from=_buildpack_ /app/buildpack /app/buildpack
RUN apk --no-cache add ca-certificates

my App Spec file

alerts:
- rule: DEPLOYMENT_FAILED
- rule: DOMAIN_FAILED
databases:
- engine: PG
  name: db
  num_nodes: 1
  size: basic-xs
  version: "12"
ingress:
  rules:
  - component:
      name: staging-stubwizard-com
    match:
      path:
        prefix: /
name: staging-stubwizard-com
region: nyc
services:
- dockerfile_path: Dockerfile
  envs:
  - key: DATABASE_URL
    scope: RUN_TIME
    value: ${db.DATABASE_URL}
  github:
    branch: develop
    deploy_on_push: true
    repo: makraz/stubwizard.com
  http_port: 8080
  instance_count: 1
  instance_size_slug: basic-xxs
  name: staging-stubwizard-com
  run_command: buildpack/bin/heroku-php-nginx -C bin/nginx_app.conf public/
  source_dir: /