ci: try to automate release

.gitea/workflows/check-upstream.yaml

@@ -0,0 +1,47 @@
+name: Check for a new Akkoma release
+
+on:
+  schedule:
+    - cron: '2 * * * *'
+
+jobs:
+  check-releases:
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Extract latest version from Akkoma forge
+        run: |
+          set -e  # Fail on error
+          LATEST_VERSION=$(curl -s https://akkoma.dev/AkkomaGang/akkoma/tags.rss | \
+            grep '<link>https://akkoma.dev/AkkomaGang/akkoma/releases/tag/' | \
+            head -n 1 | rev | cut -d '/' -f 2 | rev | cut -d '<' -f 1)
+          LATEST_VERSION=${LATEST_VERSION#v}
+          echo "Latest Akkoma version: $LATEST_VERSION"
+          echo "LATEST_VERSION=$LATEST_VERSION" >> $GITHUB_ENV
+
+      - name: Check if tag exists
+        id: check
+        run: |
+          if git rev-parse "v${LATEST_VERSION}" >/dev/null 2>&1
+          then
+            echo "Tag v${LATEST_VERSION} already exists."
+            echo "new_version=false" >> $GITHUB_OUTPUT
+          else
+            echo "New version detected: ${LATEST_VERSION}"
+            echo "new_version=true" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Configure Git
+        run: |
+          git config user.name "Gitea Actions"
+          git config user.email "actions@git.quent1.fr"
+          git remote set-url origin "https://${{ secrets.GITEA_TOKEN }}@git.quent1.fr/${{ github.repository }}"
+
+      - name: Create and push new tag
+        if: steps.check.outputs.new_version == 'true'
+        run: |
+          git tag "v${LATEST_VERSION}"
+          git push origin "v${LATEST_VERSION}"

Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.19
+FROM alpine:3
 
 ENV MIX_ENV prod
 ENV PATH "${PATH}:/opt/akkoma/bin"