CI: date versions from VERSION

.github/workflows/docker.yml

@@ -32,6 +32,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v7
 
+      - name: Read VERSION
+        id: version
+        run: echo "version=$(cat VERSION)" >> "$GITHUB_OUTPUT"
+
       - name: Login to DockerHub
         uses: docker/login-action@v4
         with:
@@ -49,9 +53,27 @@ jobs:
         with:
           context: ${{ matrix.context  }}
           push: true
-          tags: dockette/rendertron:${{ matrix.tag }}
+          tags: |
+            dockette/rendertron:${{ matrix.tag }}
+            ${{ matrix.tag == 'latest' && format('dockette/rendertron:{0}', steps.version.outputs.version) || '' }}
           platforms: linux/amd64 # linux/arm64
 
+  release:
+    name: "Release"
+    needs: docker
+    if: github.ref == 'refs/heads/master' && github.event_name == 'push'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7
+
+      - name: Create release
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: gh release view "$(cat VERSION)" || gh release create "$(cat VERSION)" --generate-notes
+
   docs:
     name: "Docs"
     needs: docker

Makefile

@@ -1,3 +1,5 @@
+VERSION:=$(shell cat VERSION)
+
 build-rendertron:
 	docker build -t dockette/rendertron ./rendertron
 
@@ -32,3 +34,13 @@ run-tracer:
 		-e TRACER_SRC_SITEMAP_1=https://example.com/sitemaps/pages.xml \
 		-e TRACER_SRC_SITEMAP_2=https://example.com/sitemaps/pages2.xml \
 		dockette/rendertron:tracer
+
+.PHONY: version
+version:
+	@echo ${VERSION}
+
+.PHONY: release
+release:
+	@date -u +%Y.%m.%d > VERSION
+	@echo "VERSION: ${VERSION} -> $$(cat VERSION)"
+	@echo "next: git commit -am \"Release: $$(cat VERSION)\" && git push"

README.md

@@ -23,6 +23,11 @@ docker run -it --rm -p 3000:3000 dockette/rendertron
 
 ![Screenshot](.docs/screenshot.png)
 
+## Versions
+
+The release version is the date in [`VERSION`](VERSION). CI pushes `latest` also as `dockette/rendertron:<VERSION>`.
+To release, run `make release`, commit and push to `master`.
+
 ## Maintenance
 
 See [how to contribute](https://github.com/dockette/.github/blob/master/CONTRIBUTING.md) to this package. Consider to [support](https://github.com/sponsors/f3l1x) **f3l1x**. Thank you for using this package.

VERSION

@@ -0,0 +1 @@
+2026.10.23