Begin releasing on schedule

.github/workflows/publish-docker-image.yaml

@@ -1,9 +1,7 @@
-name: Build Docker
+name: Build Docker Images
 
 on:
-  push:
+  workflow_call:
-    tags:
-      - '*'
 
 jobs:
   sqlite:

.github/workflows/release-on-schedule.yml

@@ -0,0 +1,12 @@
+name: Release (Monthly)
+
+on:
+  workflow_dispatch:
+  schedule:
+  # On the 15th of the month
+  - cron: '30 5 15 * *'
+
+jobs:
+  release:
+    uses: GothenburgBitFactory/taskchampion-sync-server/.github/workflows/publish-docker-image.yaml
+    secrets: inherit

.github/workflows/release-on-tag.yml

@@ -0,0 +1,11 @@
+name: Release (Tag)
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  release:
+    uses: GothenburgBitFactory/taskchampion-sync-server/.github/workflows/publish-docker-image.yaml
+    secrets: inherit