Setting up actions

.github/build.yml

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+name: Build
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  macOS:
+    name: Test
+    runs-on: macOS-13
+    steps:
+    - uses: actions/checkout@v3
+    - name: List available plugins in macOS
+      run: swift package plugin --list
+
+  Linux:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Build Docker image
+      run: docker build .

Dockerfile

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+# Use an official Swift runtime image
+FROM swift:5.8.1
+
+# Copies the root directory of the repository into the image's filesystem at `/Linux`
+ADD . /Linux
+
+# Set the working directory to `/Linux`
+WORKDIR /Linux
+
+# List available plugins in Linux
+RUN swift package plugin --list