diff --git a/.gitea/workflows/nix-deploy.yml b/.gitea/workflows/nix-deploy.yml
new file mode 100644
index 0000000..8a43398
--- /dev/null
+++ b/.gitea/workflows/nix-deploy.yml
@@ -0,0 +1,78 @@
+name: Build & Deploy (Nix)
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  build-and-deploy:
+    strategy:
+      fail-fast: false
+      max-parallel: 1
+      matrix:
+        service: [api, ml-service, web]
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out repository
+        run: |
+          git clone https://git.imrnes.team/MythEclipse/zeavis-edu.git .
+          git checkout ${{ github.sha }}
+
+      - name: Build & Deploy ${{ matrix.service }}
+        env:
+          VPS_HOST: ${{ secrets.VPS_HOST }}
+          VPS_USER: ${{ secrets.VPS_USER }}
+          VPS_SSH_KEY: ${{ secrets.VPS_SSH_KEY }}
+        run: |
+          set -eu
+
+          # --- Install Nix & Build ---
+          curl -fsSL https://install.determinate.systems/nix \
+            | sh -s -- install linux --no-confirm --init none 2>&1
+
+          mkdir -p /etc/nix
+          echo "experimental-features = nix-command flakes" >> /etc/nix/nix.conf
+
+          . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
+
+          echo "=== Building: zeavis-${{ matrix.service }} ==="
+          STORE_PATH=$(nix build .#${{ matrix.service }} --impure --option sandbox false --no-link --print-out-paths | tail -1)
+          echo "=== Store path: $STORE_PATH"
+
+          # --- Deploy ---
+          key_file=$(mktemp /tmp/deploy-key.XXXXXX)
+          if printf '%s' "$VPS_SSH_KEY" | base64 -d 2>/dev/null | head -c 6 | grep -q "BEGIN"; then
+            printf '%s' "$VPS_SSH_KEY" | base64 -d > "$key_file"
+          else
+            printf '%s\n' "$VPS_SSH_KEY" > "$key_file"
+          fi
+          chmod 600 "$key_file"
+          sed -i 's/\r$//' "$key_file"
+          ssh-keygen -y -f "$key_file" >/dev/null 2>&1 || { echo "SSH key invalid"; exit 1; }
+
+          export NIX_SSHOPTS="-i $key_file -o StrictHostKeyChecking=no"
+          nix copy --to "ssh://${VPS_USER}@${VPS_HOST}" "$STORE_PATH" 2>&1
+
+          ssh -i "$key_file" -o StrictHostKeyChecking=no "${VPS_USER}@${VPS_HOST}" "
+            set -eu
+            if [ -d /nix/var/nix/profiles/zeavis-${{ matrix.service }} ] && [ ! -L /nix/var/nix/profiles/zeavis-${{ matrix.service }} ]; then
+              rm -rf /nix/var/nix/profiles/zeavis-${{ matrix.service }}
+            fi
+            nix-env --profile /nix/var/nix/profiles/zeavis-${{ matrix.service }} --set $STORE_PATH
+            systemctl daemon-reload
+            systemctl enable zeavis-${{ matrix.service }} 2>/dev/null || true
+            systemctl restart zeavis-${{ matrix.service }}
+            for i in \$(seq 1 30); do
+              systemctl is-active --quiet zeavis-${{ matrix.service }} && break
+              sleep 1
+            done
+            systemctl is-active zeavis-${{ matrix.service }} || {
+              echo \"=== SERVICE FAILED — journal ===\"
+              journalctl -u zeavis-${{ matrix.service }} -n 40 --no-pager
+              exit 1
+            }
+            systemctl status zeavis-${{ matrix.service }} --no-pager 2>&1 | head -8
+          " 2>&1
diff --git a/Machine_Learning/model/model.onnx b/Machine_Learning/model/model.onnx
new file mode 100644
index 0000000..8edd4ec
Binary files /dev/null and b/Machine_Learning/model/model.onnx differ
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..617b2f3
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1785301185,
+        "narHash": "sha256-eoS3KQTO0aPWXZvIaRbRAzSSHW3l5wdMFXtT1ISfoKA=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "9bc02893134c733dd85de46ee4fb2fac696b5529",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..53b01dc
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,145 @@
+{
+  description = "ZeaVis Edu — Bun API + Rust ML + Vite web (Nix build)";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        packages = {
+          # ── API: Bun + Elysia + Drizzle (workspace) ────────────────
+          api = pkgs.stdenvNoCC.mkDerivation {
+            pname = "zeavis-api";
+            version = "0.1.0";
+            src = ./.;
+            nativeBuildInputs = [ pkgs.bun ];
+
+            buildPhase = ''
+              export HOME="$TMPDIR"
+              bun install --frozen-lockfile
+              bun run --cwd packages/shared build
+            '';
+
+            installPhase = ''
+              mkdir -p $out/bin $out/lib/zeavis-api
+              cp -r package.json bun.lock bunfig.toml tsconfig.base.json $out/lib/zeavis-api/
+              cp -r node_modules $out/lib/zeavis-api/node_modules
+              cp -r apps $out/lib/zeavis-api/apps
+              cp -r packages $out/lib/zeavis-api/packages
+              cat > $out/bin/zeavis-api << WRAPPER
+#!${pkgs.runtimeShell}
+cd $out/lib/zeavis-api
+exec ${pkgs.bun}/bin/bun apps/api/src/index.ts
+WRAPPER
+              chmod +x $out/bin/zeavis-api
+            '';
+          };
+
+          # ── ML Service: Rust (axum + ort/onnxruntime) ──────────────
+          ml-service = pkgs.stdenv.mkDerivation {
+            pname = "zeavis-ml-service";
+            version = "0.1.0";
+            src = ./.;
+            nativeBuildInputs = [ pkgs.rustc pkgs.cargo pkgs.pkg-config pkgs.cacert ];
+            buildInputs = [ pkgs.openssl ];
+
+            buildPhase = ''
+              export HOME="$TMPDIR" CARGO_HOME="$TMPDIR/.cargo"
+              export SRC_ROOT="$PWD"
+              cd apps/ml-service
+              cargo build --locked --release
+            '';
+
+            installPhase = ''
+              cd "$SRC_ROOT"
+              mkdir -p $out/bin $out/share/zeavis-ml
+              cp apps/ml-service/target/release/zeavis-ml-service $out/bin/.zeavis-ml-service
+              cp Machine_Learning/model/model.onnx $out/share/zeavis-ml/model.onnx
+              cat > $out/bin/zeavis-ml-service << WRAPPER
+#!${pkgs.runtimeShell}
+export MODEL_PATH="$out/share/zeavis-ml/model.onnx"
+export MODEL_INPUT_SIZE="224"
+export ML_SERVICE_HOST="0.0.0.0"
+export ML_SERVICE_PORT="8200"
+export RUST_LOG="info"
+exec $out/bin/.zeavis-ml-service
+WRAPPER
+              chmod +x $out/bin/zeavis-ml-service
+            '';
+          };
+
+          # ── Web: Vite static + nginx ───────────────────────────────
+          web = pkgs.stdenvNoCC.mkDerivation {
+            pname = "zeavis-web";
+            version = "0.1.0";
+            src = ./.;
+            nativeBuildInputs = [ pkgs.bun ];
+
+            buildPhase = ''
+              export HOME="$TMPDIR"
+              bun install --frozen-lockfile
+              bun run --cwd packages/shared build
+              bun run --cwd apps/web build
+            '';
+
+            installPhase = ''
+              mkdir -p $out/bin $out/etc $out/share/zeavis-web/html
+              cp -r apps/web/dist/* $out/share/zeavis-web/html/
+              cat > $out/etc/nginx.conf << CONF
+error_log /var/lib/zeavis-web/nginx-error.log;
+pid /var/lib/zeavis-web/nginx.pid;
+events {}
+http {
+  include ${pkgs.nginx}/conf/mime.types;
+  access_log /var/lib/zeavis-web/nginx-access.log;
+  server {
+    listen 8088;
+    server_name _;
+    root $out/share/zeavis-web/html;
+    index index.html;
+
+    location /api/ {
+      proxy_pass http://127.0.0.1:3200/api/;
+      proxy_set_header Host \$host;
+      proxy_set_header X-Real-IP \$remote_addr;
+      proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
+      proxy_set_header X-Forwarded-Proto \$scheme;
+    }
+
+    location /metrics {
+      proxy_pass http://127.0.0.1:3200/metrics;
+      proxy_set_header Host \$host;
+      proxy_set_header X-Real-IP \$remote_addr;
+      proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
+      proxy_set_header X-Forwarded-Proto \$scheme;
+    }
+
+    location / {
+      try_files \$uri \$uri/ /index.html;
+    }
+  }
+}
+CONF
+              cat > $out/bin/zeavis-web << WRAPPER
+#!${pkgs.runtimeShell}
+mkdir -p /var/lib/zeavis-web
+exec ${pkgs.nginx}/bin/nginx -c $out/etc/nginx.conf -p /var/lib/zeavis-web -g "daemon off;"
+WRAPPER
+              chmod +x $out/bin/zeavis-web
+            '';
+          };
+
+          default = self.packages.${system}.api;
+        };
+
+        devShells.default = pkgs.mkShell {
+          buildInputs = [ pkgs.bun pkgs.nodejs_22 pkgs.rustc pkgs.cargo ];
+        };
+      });
+}