fix(ci): replace drone with gitea actions

.gitea/workflows/build.yaml

@@ -0,0 +1,29 @@
+name: Build
+
+on:
+  pull_request:
+    types:
+    - opened
+    - reopened
+    - synchronize
+  push:
+    branches:
+    - master
+  workflow_dispatch: {}
+
+jobs:
+  build-arch-linux:
+    runs-on: ubuntu-latest-amd64
+    steps:
+      - uses: actions/checkout@v4.2.2
+      - uses: docker/setup-qemu-action@v3.6.0
+      - uses: docker/setup-buildx-action@v3.10.0
+
+      - name: Build image
+        run: |
+          TAG=latest
+
+          docker buildx build \
+            --file Dockerfile.archlinux \
+            --tag git.cryptic.systems/volker.raschek/latex:${TAG}-archlinux \
+            .

.gitea/workflows/markdown-linters.yaml

@@ -0,0 +1,22 @@
+name: 'Lint Markdown files'
+
+on:
+  pull_request:
+    types:
+    - opened
+    - reopened
+    - synchronize
+  push:
+    branches:
+    - master
+  workflow_dispatch: {}
+
+jobs:
+  markdown-lint:
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4.2.2
+    - uses: DavidAnson/markdownlint-cli2-action@v19.1.0
+      with:
+        globs: '**/*.md'

.gitea/workflows/release.yaml

@@ -0,0 +1,53 @@
+name: Release
+
+on:
+  push:
+    tags:
+    - "**"
+
+jobs:
+  push-arch-linux:
+    runs-on: ubuntu-latest-amd64
+    steps:
+      - uses: actions/checkout@v4.2.2
+      - uses: docker/setup-qemu-action@v3.6.0
+      - uses: docker/setup-buildx-action@v3.10.0
+
+      - uses: docker/login-action@v3.4.0
+        with:
+          registry: git.cryptic.systems
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GIT_CRYPTIC_SYSTEMS_PACKAGE_REGISTRY_TOKEN }}
+
+      - name: Build and push image
+        run: |
+          TAG=$(echo ${{ github.ref_name }} | sed 's/v//gm')
+
+          docker buildx build \
+            --file Dockerfile.archlinux \
+            --push \
+            --tag git.cryptic.systems/volker.raschek/latex:${TAG}-archlinux \
+            .
+
+  sync-to-hub-docker-io:
+    needs:
+    - push-arch-linux
+    runs-on: ubuntu-latest
+    steps:
+    - name: Copy images to docker.io
+      run: |
+        TAG=$(echo ${{ github.ref_name }} | sed 's/v//gm')
+
+        apt-get update --yes
+        apt-get install --yes skopeo
+
+        for suffix in archlinux; do
+          skopeo copy \
+            --all \
+            --dest-password ${{ secrets.DOCKER_IO_PASSWORD }} \
+            --dest-username ${{ secrets.DOCKER_IO_USERNAME }} \
+            --src-password ${{ secrets.GIT_CRYPTIC_SYSTEMS_PACKAGE_REGISTRY_TOKEN }} \
+            --src-username volker.raschek \
+              docker://git.cryptic.systems/volker.raschek/latex:${TAG}-${suffix} \
+              docker://docker.io/volkerraschek/latex:${TAG}-${suffix}
+        done

.gitea/workflows/update-docker-hub-description.yaml

@@ -0,0 +1,22 @@
+name: Update Docker Hub Description
+
+on:
+  push:
+    branches:
+    - master
+    paths:
+    - README.md
+  workflow_dispatch: {}
+
+jobs:
+  update-description-on-hub-docker-io:
+    runs-on:
+    - ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4.2.2
+    - uses: peter-evans/dockerhub-description@v4.0.2
+      with:
+        username: ${{ secrets.DOCKER_IO_USERNAME }}
+        password: ${{ secrets.DOCKER_IO_PASSWORD }}
+        repository: volkerraschek/latex
+        readme-filepath: README.md