ci: add manual run for docker build

.github/workflows/docker.yml

@@ -3,9 +3,13 @@ name: Docker
 on:
   release:
     types: [published]
+  workflow_dispatch:
 
 permissions: read-all
 
+env:
+  IMAGE_NAME: ducktors/turborepo-remote-cache
+
 jobs:
   docker-build:
     name: Docker Build
@@ -22,10 +26,6 @@ jobs:
         uses: martinbeentjes/npm-get-version-action@3cf273023a0dda27efcd3164bdfb51908dd46a5b # main
         with:
           path: .
-      - name: Set correct environment
-        run: |
-          TAG=${{ steps.package-version.outputs.current-version}}
-          echo "TAG=$TAG" >> "$GITHUB_ENV"
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@d70bba72b1f3fd22344832f00baa16ece964efeb # v3.3.0
       - name: Login to DockerHub
@@ -38,9 +38,9 @@ jobs:
           docker buildx build \
             --file Dockerfile \
             --platform linux/amd64,linux/arm64 \
-            --tag ducktors/turborepo-remote-cache:latest \
-            --tag ducktors/turborepo-remote-cache:${{ env.TAG }} \
-            --cache-from=type=gha,ducktors/turborepo-remote-cache:latest \
+            --tag ${{env.IMAGE_NAME}}:latest \
+            --tag ${{env.IMAGE_NAME}}:${{ steps.package-version.outputs.current-version}} \
+            --cache-from=type=gha,${{env.IMAGE_NAME}}:latest \
             --cache-to=type=gha,mode=max
             --push .