ci: add CodeQL analysis and Docker ecosystem to Dependabot (#791)

* ci: add CodeQL analysis and Docker ecosystem to Dependabot

Add CodeQL workflow running javascript-typescript analysis weekly and on
every PR/push to main, using the security-extended query suite. All three
codeql-action steps are SHA-pinned.

Add the docker package-ecosystem to dependabot.yml so Dependabot opens
weekly PRs to bump Dockerfile digest pins (FROM node:22-alpine@sha256:...
and the golang builder stage) when upstream images are updated.

* ci(codeql): upgrade codeql-action to v3.35.2

v3.29.0 uses Node.js 20, which is deprecated on GitHub-hosted runners as
of April 2026, causing SARIF upload failures with "Resource not accessible
by integration." v3.35.2 runs on Node.js 24 and resolves the deprecation.

* ci(codeql): add actions:read permission for workflow run API

CodeQL v3.35.2 calls the GitHub Actions REST API to fetch workflow run
context for SARIF correlation, which requires actions:read. Without it,
the analyze step fails with "Resource not accessible by integration"
when calling /repos/{owner}/{repo}/actions/runs/{run_id}.

.github/dependabot.yml

@@ -33,6 +33,13 @@ updates:
       all-npm-frontend:
         patterns: ["*"]
 
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    labels:
+      - "dependencies"
+
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:

.github/workflows/codeql.yml

@@ -1,101 +1,47 @@
-# For most projects, this workflow file will not need changing; you simply need
-# to commit it to your repository.
-#
-# You may wish to alter this file to override the set of languages analyzed,
-# or to provide custom queries or build logic.
-#
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
-name: "CodeQL Advanced"
+name: CodeQL
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [main]
   pull_request:
-    branches: [ "main" ]
+    branches: [main]
   schedule:
-    - cron: '16 1 * * 1'
+    # Weekly on Monday at 09:00 UTC
+    - cron: '0 9 * * 1'
+
+concurrency:
+  group: codeql-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  security-events: write
+  packages: read
+  actions: read
 
 jobs:
   analyze:
     name: Analyze (${{ matrix.language }})
-    # Runner size impacts CodeQL analysis time. To learn more, please see:
-    #   - https://gh.io/recommended-hardware-resources-for-running-codeql
-    #   - https://gh.io/supported-runners-and-hardware-resources
-    #   - https://gh.io/using-larger-runners (GitHub.com only)
-    # Consider using larger runners or machines with greater resources for possible analysis time improvements.
-    runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
-    permissions:
-      # required for all workflows
-      security-events: write
-
-      # required to fetch internal or private CodeQL packs
-      packages: read
-
-      # only required for workflows in private repositories
-      actions: read
-      contents: read
-
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
     strategy:
       fail-fast: false
       matrix:
-        include:
-        - language: actions
-          build-mode: none
-        - language: javascript-typescript
-          build-mode: none
-        # CodeQL supports the following values keywords for 'language': 'actions', 'c-cpp', 'csharp', 'go', 'java-kotlin', 'javascript-typescript', 'python', 'ruby', 'rust', 'swift'
-        # Use `c-cpp` to analyze code written in C, C++ or both
-        # Use 'java-kotlin' to analyze code written in Java, Kotlin or both
-        # Use 'javascript-typescript' to analyze code written in JavaScript, TypeScript or both
-        # To learn more about changing the languages that are analyzed or customizing the build mode for your analysis,
-        # see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/customizing-your-advanced-setup-for-code-scanning.
-        # If you are analyzing a compiled language, you can modify the 'build-mode' for that language to customize how
-        # your codebase is analyzed, see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages
+        language: [javascript-typescript, actions]
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v4
+      - name: Checkout repo
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
-    # Add any setup steps before running the `github/codeql-action/init` action.
-    # This includes steps like installing compilers or runtimes (`actions/setup-node`
-    # or others). This is typically only required for manual builds.
-    # - name: Setup runtime (example)
-    #   uses: actions/setup-example@v1
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@ce64ddcb0d8d890d2df4a9d1c04ff297367dea2a # v3.35.2
+        with:
+          languages: ${{ matrix.language }}
+          queries: security-extended
 
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v4
-      with:
-        languages: ${{ matrix.language }}
-        build-mode: ${{ matrix.build-mode }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@ce64ddcb0d8d890d2df4a9d1c04ff297367dea2a # v3.35.2
 
-        # For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
-        # queries: security-extended,security-and-quality
-
-    # If the analyze step fails for one of the languages you are analyzing with
-    # "We were unable to automatically build your code", modify the matrix above
-    # to set the build mode to "manual" for that language. Then modify this step
-    # to build your code.
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
-    - name: Run manual build steps
-      if: matrix.build-mode == 'manual'
-      shell: bash
-      run: |
-        echo 'If you are using a "manual" build mode for one or more of the' \
-          'languages you are analyzing, replace this with the commands to build' \
-          'your code, for example:'
-        echo '  make bootstrap'
-        echo '  make release'
-        exit 1
-
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v4
-      with:
-        category: "/language:${{matrix.language}}"
+      - name: Perform CodeQL analysis
+        uses: github/codeql-action/analyze@ce64ddcb0d8d890d2df4a9d1c04ff297367dea2a # v3.35.2
+        with:
+          category: /language:${{ matrix.language }}