Add version input to Docker build workflow

- Add optional 'version' input parameter to workflow_dispatch
- If version is provided, use it directly as the tag
- If version is empty, fall back to automatic tag detection
- Refactor tag determination logic for better flexibility

Author: codebude

.github/workflows/docker-build.yml

@@ -3,6 +3,10 @@ name: Build and Push Docker Image
 on:
   workflow_dispatch:
     inputs:
+      version:
+        description: 'Version tag to build (leave empty to use latest)'
+        required: false
+        type: string
       tag_as_latest:
         description: 'Tag image as latest'
         required: false
@@ -23,19 +27,29 @@ jobs:
 
     - name: Get latest version tag
       id: get-tag
+      if: inputs.version == ''
       run: |
         git fetch --tags
         
-        LATEST_TAG=$(git tag | grep '^v[0-9]\+\.[0-9]\+\.[0-9]\+(-rc\.[0-9]\+)?$' | sort -V | tail -1)                
+        LATEST_TAG=$(git tag | grep '^v[0-9]\+\.[0-9]\+\.[0-9]\+\(-rc\.[0-9]\+\)\?$' | sort -V | tail -1)                
         if [ -z "$LATEST_TAG" ]; then
           echo "No version tags found"
           exit 1
         fi
         echo "tag=$LATEST_TAG" >> $GITHUB_OUTPUT
 
+    - name: Set version tag
+      id: version-tag
+      run: |
+        if [ -n "${{ inputs.version }}" ]; then
+          echo "tag=${{ inputs.version }}" >> $GITHUB_OUTPUT
+        else
+          echo "tag=${{ steps.get-tag.outputs.tag }}" >> $GITHUB_OUTPUT
+        fi
+
     - name: Checkout tag
       run: |
-        git checkout ${{ steps.get-tag.outputs.tag }}
+        git checkout ${{ steps.version-tag.outputs.tag }}
 
     - name: Log in to GitHub Container Registry
       uses: docker/login-action@v3
@@ -50,7 +64,7 @@ jobs:
       with:
         images: ghcr.io/${{ github.repository }}
         tags: |
-          type=raw,value=${{ steps.get-tag.outputs.tag }}
+          type=raw,value=${{ steps.version-tag.outputs.tag }}
           type=raw,value=latest,enable=${{ inputs.tag_as_latest }}
 
     - name: Build and push Docker image
@@ -61,4 +75,4 @@ jobs:
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}
         build-args: |
-          VERSION=${{ steps.get-tag.outputs.tag }}
+          VERSION=${{ steps.version-tag.outputs.tag }}