feat: add release script for version management and tagging

.github/workflows/docker-build.yml

@@ -67,3 +67,63 @@ jobs:
           cache-from: type=gha
           cache-to: type=gha,mode=max
           platforms: linux/amd64,linux/arm64
+
+  # =============================================================================
+  # Create GitHub Release (only on tag push)
+  # =============================================================================
+  create-release:
+    runs-on: ubuntu-latest
+    needs: build-and-push
+    if: startsWith(github.ref, 'refs/tags/v')
+    permissions:
+      contents: write
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Fetch all history for changelog generation
+
+      - name: Get previous tag
+        id: prev_tag
+        run: |
+          PREV_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
+          echo "tag=${PREV_TAG}" >> $GITHUB_OUTPUT
+
+      - name: Generate changelog
+        id: changelog
+        run: |
+          CURRENT_TAG=${GITHUB_REF#refs/tags/}
+          PREV_TAG="${{ steps.prev_tag.outputs.tag }}"
+          
+          echo "## What's Changed" > changelog.md
+          echo "" >> changelog.md
+          
+          if [ -n "$PREV_TAG" ]; then
+            # Get commits between tags
+            git log ${PREV_TAG}..${CURRENT_TAG} --pretty=format:"* %s (%h)" --no-merges >> changelog.md
+          else
+            # First release - get recent commits
+            git log -20 --pretty=format:"* %s (%h)" --no-merges >> changelog.md
+          fi
+          
+          echo "" >> changelog.md
+          echo "" >> changelog.md
+          echo "## Docker Images" >> changelog.md
+          echo "" >> changelog.md
+          echo '```bash' >> changelog.md
+          echo "docker pull ghcr.io/${{ github.repository_owner }}/medassist-ng-backend:${CURRENT_TAG#v}" >> changelog.md
+          echo "docker pull ghcr.io/${{ github.repository_owner }}/medassist-ng-frontend:${CURRENT_TAG#v}" >> changelog.md
+          echo '```' >> changelog.md
+          echo "" >> changelog.md
+          echo "**Full Changelog**: https://github.com/${{ github.repository }}/compare/${PREV_TAG}...${CURRENT_TAG}" >> changelog.md
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          body_path: changelog.md
+          generate_release_notes: false
+          draft: false
+          prerelease: ${{ contains(github.ref, '-rc') || contains(github.ref, '-beta') || contains(github.ref, '-alpha') }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}