Fix dockerfile lint (#36)

.devcontainer/Dockerfile

@@ -12,19 +12,29 @@ ENV DOTNET_SDK_VERSION=8.0
 ENV NODE_VERSION=18
 
 # Install additional OS packages and .NET SDK
-RUN apt-get update && apt-get install -y --no-install-recommends \
+# hadolint ignore=DL3008
+RUN wget --progress=dot:giga https://packages.microsoft.com/config/debian/$DEBIAN_VERSION/packages-microsoft-prod.deb -O packages-microsoft-prod.deb \
+    && dpkg -i packages-microsoft-prod.deb \
+    && rm packages-microsoft-prod.deb \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends \
+    dotnet-sdk-$DOTNET_SDK_VERSION \
     git \
     apt-transport-https \
     curl \
-    wget
+    wget \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/*
 
-RUN wget https://packages.microsoft.com/config/debian/$DEBIAN_VERSION/packages-microsoft-prod.deb -O packages-microsoft-prod.deb \
-    && dpkg -i packages-microsoft-prod.deb \
-    && rm packages-microsoft-prod.deb \
-    && apt-get update \
-    && apt-get install -y --no-install-recommends dotnet-sdk-$DOTNET_SDK_VERSION
+# Install n package manager and use it to install the latest Node.js and npm
+RUN npm install -g n@latest && n $NODE_VERSION \
+    && npm install -g npm@latest
+
+# Switch back to dialog for any ad-hoc use of apt-get
+ENV DEBIAN_FRONTEND=dialog
 
-RUN apt-get clean -y && rm -rf /var/lib/apt/lists/*
+# Set the default shell to bash
+SHELL ["/bin/bash", "-c"]
 
 # Switch to the node user
 USER node
@@ -37,14 +47,4 @@ RUN dotnet tool install --global GitVersion.Tool
 RUN printf "\nalias gitversion=\"dotnet-gitversion\"\n" >> /home/node/.bashrc
 
 # Switch back to root user to install global npm packages
-USER root
-
-# Install n package manager and use it to install the latest Node.js and npm
-RUN npm install -g n && n $NODE_VERSION \
-    && npm install -g npm@latest
-
-# Switch back to dialog for any ad-hoc use of apt-get
-ENV DEBIAN_FRONTEND=dialog
-
-# Set the default shell to bash
-SHELL ["/bin/bash", "-c"]
+#USER root

.github/workflows/dockerfile-lint.yml

@@ -0,0 +1,47 @@
+name: Lint Dockerfile
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    # cSpell: ignore hadolint .devcontainer sarif codeql
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Install Hadolint
+        run: sudo wget -O /bin/hadolint https://github.com/hadolint/hadolint/releases/download/v2.8.0/hadolint-Linux-x86_64 && sudo chmod +x /bin/hadolint
+
+      - name: Create testResults directory
+        run: mkdir -p testResults
+
+      - name: Lint Dockerfile
+        run: hadolint .devcontainer/Dockerfile --failure-threshold warning --format sarif > testResults/hadolint-results.sarif
+        continue-on-error: true
+
+      - name: Check if SARIF file exists
+        id: check_sarif
+        run: |
+          if [ -f testResults/hadolint-results.sarif ]; then
+            echo "file_exists=true" >> $GITHUB_OUTPUT
+          else
+            echo "file_exists=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Upload SARIF file
+        uses: github/codeql-action/upload-sarif@v3
+        if: always() && steps.check_sarif.outputs.file_exists == 'true'
+        with:
+          sarif_file: testResults/hadolint-results.sarif
+
+      - name: Upload testResults
+        uses: actions/upload-artifact@v2
+        if: always() && steps.check_sarif.outputs.file_exists == 'true'
+        with:
+          name: hadolint-results
+          path: testResults/hadolint-results.sarif