feat: v0.16

.github/Dockerfile

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+# Kreivo CI Dockerfile - GitHub Actions Runner Base Image
+# Provides Rust toolchain, Node.js, and smart contract tools for CI
+
+FROM node:22-slim
+
+# Prevent interactive prompts during package installation
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install system dependencies required for GitHub Actions runner and builds
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    curl \
+    git \
+    libssl-dev \
+    pkg-config \
+    protobuf-compiler \
+    clang \
+    llvm \
+    jq \
+    ca-certificates \
+    sudo \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Rust toolchain with CI optimizations
+ENV RUSTUP_HOME=/usr/local/rustup \
+    CARGO_HOME=/usr/local/cargo \
+    PATH=/usr/local/cargo/bin:$PATH
+
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain none \
+    && rustup install stable nightly \
+    && rustup default stable \
+    && rustup target add wasm32-unknown-unknown --toolchain stable \
+    && rustup target add wasm32-unknown-unknown --toolchain nightly \
+    && rustup component add rust-src clippy --toolchain stable \
+    && rustup component add rust-src clippy --toolchain nightly
+
+# Install official Solidity compiler binary
+RUN curl -L -o /usr/local/bin/solc https://github.com/ethereum/solidity/releases/download/v0.8.30/solc-static-linux && \
+    chmod +x /usr/local/bin/solc
+
+# Install Parity resolc binary
+RUN curl -L -o /usr/local/bin/resolc https://github.com/paritytech/revive/releases/download/v0.4.1/resolc-x86_64-unknown-linux-musl && \
+    chmod +x /usr/local/bin/resolc
+
+# Set up environment for WASM builds
+ENV WASM_BUILD_TOOLCHAIN=nightly
+
+# Create docker user (GitHub Actions runner requirement)
+RUN useradd -m -s /bin/bash docker \
+    && mkdir -p /home/docker/actions-runner \
+    && chown -R docker:docker /home/docker/actions-runner /usr/local/cargo /usr/local/rustup
+
+USER docker
+WORKDIR /home/docker/actions-runner
+
+# Health check for container validation
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD cargo --version && node --version && solc --version || exit 1
+
+# Default command for testing the environment
+CMD ["cargo", "--version"]

.github/Dockerfile-README.md

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+# Kreivo CI Dockerfile
+
+This Dockerfile provides a **GitHub Actions runner base image** for the Kreivo blockchain project CI environment, including Rust toolchain, Node.js, and smart contract tools.
+
+## Features
+
+- **GitHub Actions optimized** - Designed as a runner container image
+- **Latest stable and nightly Rust toolchains** with WASM32 target support
+- **Node.js 22** with essential packages for smart contract development
+- **Solidity compiler** (`solc`) and **Parity tools** (`resolc`)
+- **Rust components**: `rust-src` and `clippy` for both stable and nightly
+- **Health checks** and security best practices
+- **Optimized for CI/CD** with proper caching and layer optimization
+
+## GitHub Actions Usage
+
+### Basic Job Configuration
+
+```yaml
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    container:
+      image: kreivo-ci:latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: cargo test --release
+
+  build-runtime:
+    runs-on: ubuntu-latest
+    container:
+      image: kreivo-ci:latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: cargo build --release -p kreivo-runtime
+```
+
+### With Caching
+
+```yaml
+jobs:
+  quality-checks:
+    runs-on: ubuntu-latest
+    container:
+      image: kreivo-ci:latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+      - run: cargo fmt -- --check
+      - run: cargo clippy -- -D warnings
+      - run: cargo test --release
+```
+
+## Local Development
+
+### Building the Image
+
+```bash
+# Build the CI image
+docker build -f .github/Dockerfile -t kreivo-ci:latest .
+```
+
+### Testing Locally
+
+```bash
+# Test the environment
+docker run --rm kreivo-ci:latest cargo --version
+docker run --rm kreivo-ci:latest node --version
+docker run --rm kreivo-ci:latest solc --version
+
+# Run commands with volume mount
+docker run --rm -v $(pwd):/workspace -w /workspace kreivo-ci:latest cargo build --release
+```
+
+### Using with Docker Compose
+
+```yaml
+version: '3.8'
+services:
+  kreivo-dev:
+    build: .
+    volumes:
+      - .:/workspace
+      - cargo-cache:/usr/local/cargo/registry
+      - target-cache:/workspace/target
+    working_directory: /workspace
+    environment:
+      - USER=docker  # Match container user
+
+volumes:
+  cargo-cache:
+  target-cache:
+```
+
+## Environment Variables
+
+- `WASM_BUILD_TOOLCHAIN=nightly` - Toolchain used for WASM builds
+- `RUSTUP_HOME=/usr/local/rustup` - Rust toolchain location
+- `CARGO_HOME=/usr/local/cargo` - Cargo home directory
+
+## Included Tools
+
+### Rust Toolchain
+- **Stable** and **Nightly** versions
+- **wasm32-unknown-unknown** target for both toolchains
+- **rust-src** and **clippy** components
+
+### Node.js 22
+- **solc** - Solidity compiler
+- **resolc** - Parity Solidity compiler
+- **yarn** - Package manager
+
+### System Dependencies
+- **build-essential** - C/C++ build tools
+- **clang** & **llvm** - Additional compilers
+- **protobuf-compiler** - Protocol buffer compiler
+- **git** - Version control
+
+## Security Features
+
+- Non-root docker user execution
+- Minimal Debian base image (node:22-slim)
+- Proper dependency management
+- Health check monitoring
+
+## Performance Optimizations
+
+- Single-stage build for faster runner startup
+- Pre-installed toolchains reduce setup time
+- Optimized layer caching
+- GitHub Actions runner compatible