init CTFd source

.github/workflows/docker-build.yml

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+name: Docker build image on release
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  docker:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Set repo name lowercase
+        id: repo
+        uses: ASzc/change-string-case-action@v2
+        with:
+          string: ${{ github.repository }}
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            ${{ steps.repo.outputs.lowercase }}:latest
+            ghcr.io/${{ steps.repo.outputs.lowercase }}:latest
+            ${{ steps.repo.outputs.lowercase }}:${{ github.event.release.tag_name }}
+            ghcr.io/${{ steps.repo.outputs.lowercase }}:${{ github.event.release.tag_name }}