Add basic CI

Author: robyoung

.github/workflows/ci.yaml

@@ -0,0 +1,33 @@
+name: CI
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          target: thumbv6m-none-eabi
+          override: true
+          components: rustfmt, clippy
+
+      - name: rustfmt
+        run: cargo fmt -- --check
+
+      - name: clippy
+        run: cargo clippy --color=always -- -D warnings
+
+      - name: build
+        run: cargo check
+
+

.gitignore

@@ -3,3 +3,5 @@
 **/*.rs.bk
 Cargo.lock
 bloat_log*
+!.gitignore
+!.github