chore: minor fixes in CI, README, and keep the bin/ directory

.github/workflows/build.yml

@@ -0,0 +1,23 @@
+name: Build
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/cache@v2
+      with:
+        key: ${{ github.ref }}
+        path: .cache
+    - name: Install dependencies
+      run: sudo apt-get update && sudo apt-get install -y libboost-all-dev gcc g++
+    - name: Build
+      run: make -j

README.md

@@ -90,4 +90,4 @@ Github Repo Root
 ```
 
 ## Contact
-Please contact [Yifan Qiao]([email protected]) for any questions.
+Please contact [Yifan Qiao](mailto:[email protected]) for any questions.