[update] CI/CD.

Author: Shinyzenith

.github/workflows/build.yml

@@ -1,6 +1,8 @@
 name: Build Swhkd
 
 on: [push, pull_request]
+  branches:
+  - main
 
 env:
   CARGO_TERM_COLOR: always

.github/workflows/ci.yml

@@ -6,6 +6,16 @@ env:
   CARGO_TERM_COLOR: always
 
 jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    - name: Build
+      run: cargo build --release
+
   test:
     runs-on: ubuntu-latest