fix: build workflows and migrate base to oses

Fix bot image workflow build and migrate base images to oses since it appears we already have such folder - although badly named (why not base?).

.github/workflows/bot.yml

@@ -32,7 +32,7 @@ jobs:
           password: ${{ secrets.REGISTRY_TOKEN }}
       - uses: docker/build-push-action@v2
         with:
-          context: ./bot
+          context: ./bot/${{ matrix.tag }}
           file: ./bot/${{ matrix.tag }}/Dockerfile
           platforms: linux/amd64
           push: true