DVLP-011: Add CI workflow

.dockerignore

@@ -0,0 +1,8 @@
+.gradle
+.gradle-user
+.idea
+build
+out
+.git
+.github
+*.iml

.github/workflows/ci.yml

@@ -0,0 +1,102 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - master
+      - develop
+  push:
+    branches:
+      - master
+      - develop
+
+permissions:
+  contents: read
+
+jobs:
+  pull-request-rules:
+    name: Pull Request Rules
+    runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Validate PR title
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}
+        run: |
+          if [[ ! "$PR_TITLE" =~ ^DVLP ]]; then
+            echo "PR title must start with DVLP."
+            echo "Actual title: $PR_TITLE"
+            exit 1
+          fi
+
+          title_length=${#PR_TITLE}
+          if (( title_length > 120 )); then
+            echo "PR title must not be longer than 120 characters."
+            echo "Actual length: $title_length"
+            exit 1
+          fi
+
+      - name: Validate commit titles
+        env:
+          BASE_SHA: ${{ github.event.pull_request.base.sha }}
+          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+        run: |
+          invalid_commits=$(git log --format='%H%x09%s' "$BASE_SHA..$HEAD_SHA" | awk -F '\t' '$2 !~ /^DVLP/ { print }')
+
+          if [[ -n "$invalid_commits" ]]; then
+            echo "Every commit title in the PR must start with DVLP."
+            echo "$invalid_commits"
+            exit 1
+          fi
+
+  unit-tests:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '21'
+
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Make Gradle wrapper executable
+        run: chmod +x ./gradlew
+
+      - name: Run unit tests
+        run: ./gradlew test
+
+  checkstyle:
+    name: Checkstyle
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '21'
+
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Make Gradle wrapper executable
+        run: chmod +x ./gradlew
+
+      - name: Run Checkstyle
+        run: ./gradlew checkstyleMain checkstyleTest

Dockerfile

@@ -0,0 +1,23 @@
+FROM eclipse-temurin:21-jdk AS builder
+
+WORKDIR /workspace
+
+COPY gradlew .
+COPY gradle gradle
+COPY build.gradle .
+COPY settings.gradle .
+COPY src src
+COPY config config
+
+RUN chmod +x ./gradlew
+RUN ./gradlew bootJar --no-daemon
+
+FROM eclipse-temurin:21-jre
+
+WORKDIR /app
+
+COPY --from=builder /workspace/build/libs/*.jar app.jar
+
+EXPOSE 8080
+
+ENTRYPOINT ["java", "-jar", "app.jar"]