Publish nix docker image. (#3122)

* Publish nix docker image.

* Run during PR.

* Something else.

* Forgot to push.

* Build zstd.

* Pushing with skopeo

* Testing the PR.

* Runnign from nix.

* Cleaner tags.

.github/workflows/nix_build.yaml

@@ -0,0 +1,53 @@
+name: "Nix Build Docker image"
+on:
+  pull_request:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - 'v*'
+concurrency:
+  group: nix-image-${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  build_nix_image:
+    runs-on:
+      group: aws-highmemory-32-plus-priv
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v27
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v14
+      with:
+        name: text-generation-inference
+        # If you chose signing key for write access
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+      env:
+        USER: github_runner
+    - name: Build
+      run: nix build .#dockerImage
+    - name: Initialize Docker Buildx
+      uses: docker/setup-buildx-action@v3
+      with:
+        install: true
+        buildkitd-config: /tmp/buildkitd.toml
+    - name: Inject slug/short variables
+      uses: rlespinasse/github-slug-action@v4.4.1
+    - name: Login to internal Container Registry
+      # if: github.event_name != 'pull_request'
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.REGISTRY_USERNAME }}
+        password: ${{ secrets.REGISTRY_PASSWORD }}
+        registry: registry.internal.huggingface.tech
+    - name: Push to docker
+      run: |
+        if [ "${{ github.event_name }}" = "pull_request" ]; then
+          export TAG=nix-sha-${{ env.GITHUB_SHA_SHORT }}
+        else
+          export TAG=nix-{{ version }}
+        fi
+        export IMAGE=registry.internal.huggingface.tech/api-inference/community/text-generation-inference:$TAG
+        nix-shell -p skopeo --command "skopeo --insecure-policy copy docker-archive:$(readlink -f ./result) docker://$IMAGE --dest-compress-format zstd"

nix/docker.nix

@@ -3,7 +3,6 @@
   dockerTools,
   cacert,
   text-generation-inference,
-  runCommand,
   stream ? false,
 }:
 
@@ -13,6 +12,7 @@ in
 build {
   name = "tgi-docker";
   tag = "latest";
+  compressor = "zstd";
   config = {
     EntryPoint = [ "${text-generation-inference}/bin/text-generation-inference" ];
     Env = [