feat(web/rce): 添加题目文件及工作流 (#1)

* feat(web/rce): 添加题目文件

* ci(web/rce): 添加工作流

.github/workflows/web.rce.yml

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+name: Challenge RCE
+
+on:
+  push:
+    branches: ["main"]
+    paths:
+      - "!**/README.md"
+      - "challenges/web/rce/build/**"
+  workflow_dispatch:
+
+env:
+  TYPE: web
+  NAME: rce
+  REGISTRY: ghcr.io
+
+jobs:
+  challenge-build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ github.repository }}/${{ env.NAME }}
+          tags: |
+            latest
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: challenges/${{ env.TYPE }}/${{ env.NAME }}/build
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          push: true

challenges/web/rce/README.md

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+# RCE
+
+- 作者：-
+- 参考：-
+- 难度：Baby
+- 分类：Web
+- 镜像：-
+- 端口：-
+
+## 题目描述
+
+<description>
+
+## 题目解析
+
+<analysis>

challenges/web/rce/build/Dockerfile

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+FROM ghcr.io/svuctf/base-v2/php-nginx:8.3
+
+COPY --chown=www-data  /html /var/www/html

challenges/web/rce/build/html/index.php

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+<?php
+
+highlight_file(__FILE__);
+
+$rce = $_GET['rce'];
+eval($rce);