added dyndns Docker image

.gitea/workflows/build-dyndns.yaml

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+name: CI
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'dyndns/*'
+      - '.gitea/workflows/build-dyndns.yaml'      
+jobs:
+  "Build dyndns docker images":
+    runs-on: hostinger
+    steps:
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3.4.0
+        with:
+          driver: docker-container
+          platforms: |
+            linux/amd64
+            linux/arm64
+      -
+        name: Login to Gitea container registry
+        uses: docker/login-action@v3
+        with:
+          registry: gitea.woggioni.net
+          username: woggioni
+          password: ${{ secrets.PUBLISHER_TOKEN }}
+      -
+        name: Build and push dyndns images
+        uses: docker/build-push-action@v6
+        with:
+          context: "{{defaultContext}}:dyndns"
+          platforms: |
+            linux/amd64
+            linux/arm64
+          push: true
+          pull: true
+          tags: |
+            "gitea.woggioni.net/woggioni/dyndns:latest"
+          cache-from: type=registry,ref=gitea.woggioni.net/woggioni/dyndns:buildx
+          cache-to: type=registry,mode=max,compression=zstd,image-manifest=true,oci-mediatypes=true,ref=gitea.woggioni.net/woggioni/dyndns:buildx          
+

dyndns/Dockerfile

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+FROM alpine:3.22
+
+RUN --mount=type=cache,target=/var/cache/apk apk add python3 pipx
+RUN addgroup -S dyndns
+RUN adduser -D -S -h /var/lib/dyndns -G dyndns dyndns
+
+# ADD --chown=dyndns:dyndns pip.conf /var/lib/dyndns/.pip/pip.conf
+
+USER dyndns
+WORKDIR /var/lib/dyndns
+RUN pipx install --index-url https://gitea.woggioni.net/api/packages/woggioni/pypi/simple/ dyndns
+ENV PATH="/var/lib/dyndns/.local/bin:$PATH"

dyndns/pip.conf

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+[global]
+index-url = https://gitea.woggioni.net/api/packages/woggioni/pypi/simple
+#extra-index-url = https://pypi.org/simple