added synapse image

.gitea/workflows/build-synapse.yaml

@@ -0,0 +1,34 @@
+name: CI
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - 'synapse/*'
+      - '.gitea/workflows/build-synapse.yaml'      
+jobs:
+  "Build synapse docker images":
+    runs-on: woryzen
+    steps:
+      -
+        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 synapse images
+        uses: docker/build-push-action@v6
+        with:
+          builder: multiplatform-builder
+          context: "{{defaultContext}}:synapse"
+          build-args: |
+            VERSION=1.153.0
+          platforms: |
+            linux/amd64
+          push: true
+          pull: true
+          tags: |
+            "gitea.woggioni.net/woggioni/synapse:latest"
+            "gitea.woggioni.net/woggioni/synapse:1.153.0"
+

synapse/Dockerfile

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+ARG VERSION
+FROM matrixdotorg/synapse:v${VERSION}
+USER root
+RUN python -m pip install synapse-s3-storage-provider
+USER 1000