have to use bbranch for dockerfile

.github/workflows/docker-build.yml

@@ -133,12 +133,6 @@ jobs:
       ghcr_tags: ${{ steps.set-vars.outputs.ghcr_tags }}
       file: ${{ steps.set-vars.outputs.file }}
     steps:
-      # TODO: why checkout? 
-      - name: Check out the code at a specific ref
-        uses: actions/checkout@v4
-        with:
-          ref: ${{ inputs.nightly_tag_main || github.ref }}
-
       - name: Set Dockerfile and Tags
         id: set-vars
         run: |
@@ -177,7 +171,9 @@ jobs:
     runs-on: ubuntu-latest
     needs: [get-version, setup]
     steps:
-      # TODO: Should be inputs.version iff not base
+      # TODO: Should be inputs.version iff not base version
+      # if it's not main, you still kind of have to supply a main tag. it's weird, since we don't have a base tag without a main.  
+
       - name: Check out the code at a specific ref
         uses: actions/checkout@v4
         with: