Add prebuilt Caddy

.github/workflows/build_caddy.yml

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+# SPDX-FileCopyrightText: 2026 Marlon W (Mawoka)
+#
+# SPDX-License-Identifier: MPL-2.0
+
+name: "[CI] Build"
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [master]
+    paths:
+      - ".github/workflows/build_caddy.yml"
+      - "Caddyfile-docker"
+      - "Dockerfile.caddy"
+#  pull_request:
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: classquiz-caddy
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      # This is used to complete the identity challenge
+      # with sigstore/fulcio when running outside of PRs.
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      # Workaround: https://github.com/docker/build-push-action/issues/461
+      - name: Setup Docker buildx
+        uses: docker/setup-buildx-action@v4
+
+      # Login against a Docker registry except on PR
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v4
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # Extract metadata (tags, labels) for Docker
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v6
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      # Build and push Docker image with Buildx (don't push on PR)
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v7
+        with:
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/arm64

Dockerfile.caddy

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+# SPDX-FileCopyrightText: 2026 Marlon W (Mawoka)
+#
+# SPDX-License-Identifier: MPL-2.0
+FROM caddy:alpine
+COPY Caddyfile-docker /etc/caddy/Caddyfile

migration_to_rust.md

@@ -1,8 +0,0 @@
-<!--
-SPDX-FileCopyrightText: 2023 Marlon W (Mawoka)
-
-SPDX-License-Identifier: MPL-2.0
-
--->
-
-# Migration of the Backend to Rust (long term goal)