update docker build

Author: DannyBen

.github/workflows/docker-latest.yml

@@ -1,28 +1,51 @@
 name: Docker build (version + latest)
+
 on:
-  push: { tags: 'v[0-9]+.[0-9]+.[0-9]+' }
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: Tag to build
+        required: true
+        default: '0.6.3'
+
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
 
 jobs:
   docker:
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+
       - name: Extract tag
-        run: echo "TAG=${GITHUB_REF#refs/*/v}" >> $GITHUB_ENV
+        if: github.event_name == 'push'
+        run: echo "TAG=${GITHUB_REF#refs/tags/v}" >> $GITHUB_ENV
+
+      - name: Set tag from input
+        if: github.event_name == 'workflow_dispatch'
+        run: echo "TAG=${{ github.event.inputs.tag }}" >> $GITHUB_ENV
+
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
+
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
+
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64
           push: true
-          tags: dannyben/completely,dannyben/completely:${{ env.TAG }}
+          tags: |
+            dannyben/completely
+            dannyben/completely:${{ env.TAG }}

Dockerfile

@@ -1,4 +1,4 @@
-FROM dannyben/alpine-ruby
+FROM dannyben/alpine-ruby:3.3.3
 
 ENV PS1 "\n\n>> completely \W \$ "
 WORKDIR /app