feat: ci: add workflow to check available dependencies updates

Signed-off-by: Christoph Heiss <christoph@c8h4.io>

.forgejo/workflows/check-deps.yaml

@@ -0,0 +1,89 @@
+---
+name: check dependencies
+
+on:
+  push:
+  pull_request:
+
+env:
+  MAVEN_VERSION: '3.9.9'
+  MAVEN_OPTS: '-Dmaven.repo.local=.m2'
+  MAVEN_ARGS: '--batch-mode --errors --fail-at-end --show-version'
+
+jobs:
+  check-backend-dependencies:
+    runs-on: debian-latest
+    steps:
+      - name: checkout repository
+        uses: actions/checkout@v4
+
+      - name: set up java
+        uses: https://github.com/actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: temurin
+          cache: maven
+          cache-dependency-path: backend/pom.xml
+
+      - name: set up maven
+        run: |
+          curl -L "https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/$MAVEN_VERSION/apache-maven-$MAVEN_VERSION-bin.tar.gz" | tar -vxzC /opt
+          echo "/opt/apache-maven-$MAVEN_VERSION/bin" >>$GITHUB_PATH
+
+      - name: check dependencies version
+        working-directory: backend
+        run: mvn versions:display-dependency-updates
+
+      - name: check maven plugins version
+        working-directory: backend
+        run: mvn versions:display-plugin-updates
+
+  check-frontend-dependencies:
+    runs-on: debian-latest
+    steps:
+      - name: checkout repository
+        uses: actions/checkout@v4
+
+      - name: retrieve npm cache directory
+        id: npm-cache-dir
+        run: echo "dir=$(npm config get cache)" >> $GITHUB_OUTPUT
+
+      - name: hit npm dependencies cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.npm-cache-dir.outputs.dir }}
+          key: ${{ runner.os }}-npm-frontend-${{ hashFiles('frontend/package-lock.json') }}
+          restore-keys: ${{ runner.os }}-npm-frontend-
+
+      - name: install npm dependencies
+        working-directory: frontend
+        run: npm ci
+
+      - name: check dependencies version
+        working-directory: frontend
+        run: sh -c 'npm outdated; exit 0'
+
+  check-e2e-dependencies:
+    runs-on: debian-latest
+    steps:
+      - name: checkout repository
+        uses: actions/checkout@v4
+
+      - name: retrieve npm cache directory
+        id: npm-cache-dir
+        run: echo "dir=$(npm config get cache)" >> $GITHUB_OUTPUT
+
+      - name: hit npm dependencies cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.npm-cache-dir.outputs.dir }}
+          key: ${{ runner.os }}-npm-e2e-${{ hashFiles('e2e/package-lock.json') }}
+          restore-keys: ${{ runner.os }}-npm-e2e-
+
+      - name: install npm dependencies
+        working-directory: e2e
+        run: npm ci
+
+      - name: check dependencies version
+        working-directory: e2e
+        run: sh -c 'npm outdated; exit 0'