chore: add GitHub Actions workflows, Dockerfile, and update docs

Author: CI Bot

.github/workflows/docker-test.yml

@@ -0,0 +1,25 @@
+name: 'Docker Build & Test'
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+
+jobs:
+  docker:
+    name: Build and Run Docker Container
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Build Docker image
+        run: |
+          docker build -t nix-shell-env .
+
+      - name: Run Docker container to verify
+        run: |
+          docker run --rm nix-shell-env echo "Docker container is working"

.github/workflows/nix-build.yml

@@ -0,0 +1,26 @@
+name: "Nix Build"
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+
+jobs:
+  build:
+    name: Build Nix Package
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Install Nix
+        uses: cachix/install-nix-action@v14
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
+      - name: Build package
+        run: |
+          nix-build shell.nix --no-out-link

Dockerfile

@@ -0,0 +1,31 @@
+# Use Ubuntu as base image
+FROM ubuntu:latest
+
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install prerequisites
+RUN apt-get update \
+    && apt-get install -y curl git ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create Nix builder users
+RUN groupadd -r nixbld \
+    && for i in $(seq 1 10); do \
+           useradd -r -g nixbld -G nixbld -M -N -s /bin/false nixbld$i; \
+       done \
+    && mkdir -m 0755 /nix && chown root /nix
+
+# Install Nix (single-user)
+RUN curl -L https://nixos.org/nix/install | sh
+
+# Ensure nix binaries are on PATH
+ENV PATH=/root/.nix-profile/bin:${PATH}
+
+# Clone this repository and enter nix-shell
+RUN cd /root/ \
+    && git clone https://github.com/walidbr/nix-shell-environment.git \
+    && cd nix-shell-environment \
+    && nix-shell --run "echo 'Nix shell OK'"
+
+# Default to an interactive shell
+CMD ["nix-shell"]

readme.md

@@ -65,6 +65,13 @@ exit
 ```
 
 ---
+## ▶️ Usage via Docker
+
+Build and run using Docker:
+```bash
+docker build -t nix-shell-env .
+docker run --rm -it nix-shell-env
+```
 
 ## 📦 What’s Inside?
 
@@ -85,6 +92,7 @@ exit
 | `neofetch`| System info                        |
 | `rustup`  | Rust installer (if needed)         |
 | `tmux`    | Terminal multiplexer               |
+| `yazi`    | Interactive CLI productivity tool  |
 
 ---
 
@@ -112,4 +120,3 @@ For faster startup and evaluation caching, consider switching to [`nix develop`
 ## 📄 License
 
 MIT — do whatever you want.
-