add CI actions

.github/workflows/audit.yml

@@ -0,0 +1,33 @@
+# This runs `cargo audit` on all dependencies (only if Cargo deps changed)
+
+name: Audit
+
+on:
+  push:
+    paths:
+      - '**/Cargo.toml'
+      - '**/Cargo.lock'
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  audit:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Cache
+      uses: actions/cache@v3.2.3
+      with:
+        path: |
+          ~/.cargo
+          target
+        key: audit
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    - name: Install dependencies
+      run: cargo install cargo-audit
+    - name: Audit
+      run: cargo audit

.github/workflows/ci.yml

@@ -0,0 +1,45 @@
+# This [clippys, tests, builds] on [windows, macos, linux]
+
+name: CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CARGO_TERM_COLOR: always
+  # Show full panics.
+  RUST_BACKTRACE: "full"
+  # Increase thread stack size to 8 megabytes.
+  RUST_MIN_STACK: 8000000
+
+jobs:
+  ci:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [windows-2019, macos-11, ubuntu-20.04]
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Cache
+      uses: actions/cache@v3
+      with:
+        path: target
+        key: ${{ matrix.os }}
+
+    - name: Clippy
+      run: cargo clippy
+
+    - name: Test
+      run: cargo test
+
+    - name: Build
+      run: cargo build

.github/workflows/rust.yml

@@ -1,22 +0,0 @@
-name: Rust
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-
-env:
-  CARGO_TERM_COLOR: always
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose

README.md

@@ -5,7 +5,7 @@
 
 > An up and coming Rust Monero node.
 
-[![Matrix](https://img.shields.io/badge/Matrix-Cuprate-white?logo=matrix&labelColor=grey&logoColor=white)](https://matrix.to/#/#cuprate:monero.social)
+[![Matrix](https://img.shields.io/badge/Matrix-Cuprate-white?logo=matrix&labelColor=grey&logoColor=white)](https://matrix.to/#/#cuprate:monero.social) [![CI](https://github.com/Cuprate/cuprate/actions/workflows/ci.yml/badge.svg)](https://github.com/Cuprate/cuprate/actions/workflows/ci.yml)
 
 Cuprate will be an alternative Monero node written from the ground up in Rust. It 
 will be able to independently validate Monero consensus rules providing a layer of