feat(backends): add CPU variant for diffusers backend (#6128)

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

.github/workflows/backend.yml

@@ -99,6 +99,18 @@ jobs:
             backend: "diffusers"
             dockerfile: "./backend/Dockerfile.python"
             context: "./backend"
+          - build-type: ''
+            cuda-major-version: ""
+            cuda-minor-version: ""
+            platforms: 'linux/amd64'
+            tag-latest: 'auto'
+            tag-suffix: '-cpu-diffusers'
+            runs-on: 'ubuntu-latest'
+            base-image: "ubuntu:22.04"
+            skip-drivers: 'true'
+            backend: "diffusers"
+            dockerfile: "./backend/Dockerfile.python"
+            context: "./backend"
           # CUDA 11 additional backends
           - build-type: 'cublas'
             cuda-major-version: "11"

backend/index.yaml

@@ -202,6 +202,7 @@
     amd: "rocm-diffusers"
     nvidia-l4t: "nvidia-l4t-diffusers"
     metal: "metal-diffusers"
+    default: "cpu-diffusers"
 - &exllama2
   name: "exllama2"
   urls:
@@ -899,6 +900,17 @@
     amd: "rocm-diffusers-development"
     nvidia-l4t: "nvidia-l4t-diffusers-development"
     metal: "metal-diffusers-development"
+    default: "cpu-diffusers-development"
+- !!merge <<: *diffusers
+  name: "cpu-diffusers"
+  uri: "quay.io/go-skynet/local-ai-backends:latest-cpu-diffusers"
+  mirrors:
+    - localai/localai-backends:latest-cpu-diffusers
+- !!merge <<: *diffusers
+  name: "cpu-diffusers-development"
+  uri: "quay.io/go-skynet/local-ai-backends:master-cpu-diffusers"
+  mirrors:
+    - localai/localai-backends:master-cpu-diffusers
 - !!merge <<: *diffusers
   name: "nvidia-l4t-diffusers"
   uri: "quay.io/go-skynet/local-ai-backends:latest-gpu-nvidia-l4t-diffusers"