meta: Add github action to auto-build and release new tagged versions

.github/workflows/rust.yml

@@ -0,0 +1,29 @@
+name: ARMv7 build
+
+on: 
+  push:
+    tags:
+    - '*'
+
+jobs:
+  linux_arm7:
+    name: Linux ARMv7
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: armv7-unknown-linux-gnueabihf
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: build
+          args: --release --target armv7-unknown-linux-gnueabihf
+      - uses: ncipollo/release-action@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          allowUpdates: true
+          artifacts: "./target/*/release/rpi-ds18b20-rust"
+