Add workflow to publish docker images

Author: vladimir-litvinchik

.github/workflows/docker-publish.yml

@@ -0,0 +1,70 @@
+name: Publish Docker Images
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version tag for docker images (e.g. 25.12)'
+        required: true
+        type: string
+      push:
+        description: 'Push images to Docker Hub'
+        required: true
+        type: boolean
+        default: false
+      latest:
+        description: 'Also tag openjdk18-bullseye-spring as latest'
+        required: true
+        type: boolean
+        default: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        framework: [spring, dropwizard]
+        jdk: [openjdk8, openjdk11, openjdk18]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        if: ${{ inputs.push }}
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Set context directory
+        id: ctx
+        run: |
+          if [ "${{ matrix.framework }}" = "spring" ]; then
+            echo "dir=Demos/Spring" >> "$GITHUB_OUTPUT"
+          else
+            echo "dir=Demos/Dropwizard" >> "$GITHUB_OUTPUT"
+          fi
+
+      - name: Determine tags
+        id: tags
+        run: |
+          TAG="groupdocs/viewer:${{ inputs.version }}-java-${{ matrix.jdk }}-bullseye-${{ matrix.framework }}"
+          TAGS="${TAG}"
+          if [ "${{ inputs.latest }}" = "true" ] && [ "${{ matrix.framework }}" = "spring" ] && [ "${{ matrix.jdk }}" = "openjdk18" ]; then
+            TAGS="${TAGS},groupdocs/viewer:latest"
+          fi
+          echo "tags=${TAGS}" >> "$GITHUB_OUTPUT"
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: ${{ steps.ctx.outputs.dir }}
+          file: ${{ steps.ctx.outputs.dir }}/docker/Dockerfile-${{ matrix.jdk }}-bullseye
+          push: ${{ inputs.push }}
+          tags: ${{ steps.tags.outputs.tags }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2018 Aspose Pty Ltd
+Copyright (c) 2026 Aspose Pty Ltd
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal