Update CI workflow to test on Linux (#12)

Author: mattt

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ on:
     branches: ["main"]
 
 jobs:
-  test:
+  test-macos:
     name: Swift ${{ matrix.swift }} on Xcode ${{ matrix.xcode }}
     runs-on: ${{ matrix.runs-on }}
     env:
@@ -25,7 +25,7 @@ jobs:
           - swift: "6.2"
             xcode: "26.0"
             runs-on: macos-26
-
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@v4
 
@@ -37,3 +37,29 @@ jobs:
 
       - name: Test
         run: swift test -v
+
+  test-linux:
+    name: Swift ${{ matrix.swift-version }} on Linux
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        swift-version:
+          - 6.0.3
+          - 6.1.3
+          - 6.2.1
+    timeout-minutes: 10
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Swift
+        uses: vapor/swiftly-action@v0.2
+        with:
+          toolchain: ${{ matrix.swift-version }}
+
+      - name: Build
+        run: swift build -v
+
+      - name: Test
+        run: swift test -v