chore: Setup initial version of build/publish GitHub Actions

.github/workflows/build.yml

@@ -0,0 +1,17 @@
+on: push
+
+name: Build
+
+jobs:
+  build_and_test:
+    name: Build cloudflare-ddns
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout latest
+        uses: actions/checkout@master
+      - name: Cargo build
+        uses: actions-rs/cargo@v1
+        with:
+          toolchain: nightly
+          command: build
+          arguments: --release

.github/workflows/publish.yml

@@ -0,0 +1,23 @@
+on:
+  push:
+    - master
+
+name: Publish to crates.io
+
+jobs:
+  build_and_test:
+    name: Publish cloudflare-ddns
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout latest master
+        uses: actions/checkout@master
+      - name: Login to crates.io
+        uses: actions-rs/cargo@v1
+        with:
+          toolchain: nightly
+          command: login ${{ secrets.CRATES_TOKEN }}
+      - name: Publish to crates.io
+        uses: actions-rs/cargo@v1
+        with:
+          toolchain: nightly
+          command: publish