feat: add flake.nix for dockerless setup (mudler#9851)

* Add flake.nix

Signed-off-by: Azteczek <243776410+Azteczek@users.noreply.github.com>

* Add flake.lock

Signed-off-by: Azteczek <243776410+Azteczek@users.noreply.github.com>

---------

Signed-off-by: Azteczek <243776410+Azteczek@users.noreply.github.com>

Author: Azteczek

flake.lock

@@ -0,0 +1,61 @@
+# Made by Azteczek
+{
+  description = "LocalAI flake";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    inference-defaults = {
+      url = "https://raw.githubusercontent.com/unslothai/unsloth/main/studio/backend/assets/configs/inference_defaults.json";
+      flake = false;
+    };
+  };
+
+  outputs = { self, nixpkgs, inference-defaults }:
+    let
+      system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      packages.${system}.default = pkgs.buildGoModule {
+        pname = "localai";
+        version = "custom";
+        
+ 	src = ./sources;
+        proxyVendor = true;
+        vendorHash = "sha256-MdadwbUc2pwfpC9ScsiIfjGIcAOgcwSm6rt/KNlTIuA=";
+
+        nativeBuildInputs = with pkgs; [ 
+          pkg-config cmake gcc protobuf go-protobuf protoc-gen-go protoc-gen-go-grpc
+        ];
+
+        env = {
+          CGO_ENABLED = "0";
+        };
+
+        preBuild = ''
+          
+          PROTO_SOURCE_DIR=$(find . -name "*.proto" -printf "%h" -quit)
+          mkdir -p pkg/grpc/proto
+          ${pkgs.protobuf}/bin/protoc \
+            -I=$PROTO_SOURCE_DIR \
+            -I. \
+            --go_out=pkg/grpc/proto --go_opt=paths=source_relative \
+            --go-grpc_out=pkg/grpc/proto --go-grpc_opt=paths=source_relative \
+            $PROTO_SOURCE_DIR/*.proto
+
+          go mod edit -replace github.com/mudler/LocalAI/pkg/grpc/proto=./pkg/grpc/proto
+          
+          mkdir -p core/config/gen_inference_defaults
+          cp ${inference-defaults} core/config/gen_inference_defaults/inference_defaults.json
+          sed -i '/go:generate/d' core/config/inference_defaults.go || true
+        
+	'';
+
+        subPackages = [ "cmd/local-ai" ];
+        doCheck = false;
+
+        postInstall = ''
+          [ -f $out/bin/local-ai ] && mv $out/bin/local-ai $out/bin/localai
+        '';
+      };
+    };
+}