feat: Docker 및 CI 초기 설정 (#12)

.dockerignore

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+.git
+.github
+.gradle
+build
+out
+bin
+
+.idea
+.vscode
+*.iml
+*.ipr
+*.iws
+.classpath
+.project
+.settings
+.factorypath
+.apt_generated
+.springBeans
+.sts4-cache
+nbproject
+nbbuild
+dist
+nbdist
+.nb-gradle
+
+.env
+.env.*
+!.env.example
+application-local.yml
+application-dev.yml
+application-prod.yml
+
+logs
+*.log
+*.tmp
+*.swp
+.DS_Store
+Thumbs.db
+
+docker-compose*.yml

.github/workflows/ci.yml

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+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - develop
+      - main
+
+jobs:
+  build:
+    name: Build and Docker Image Check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Java 21
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "21"
+          cache: gradle
+
+      - name: Make Gradle Wrapper executable
+        run: chmod +x ./gradlew
+
+      - name: Build Spring Boot jar
+        run: ./gradlew clean bootJar -x test --no-daemon
+
+      - name: Build Docker image
+        run: docker build -t slatto-api:ci .

Dockerfile

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+FROM eclipse-temurin:21-jdk-alpine AS build
+
+WORKDIR /workspace
+
+COPY gradlew settings.gradle build.gradle ./
+COPY gradle ./gradle
+
+RUN chmod +x ./gradlew
+RUN ./gradlew dependencies --no-daemon
+
+COPY src ./src
+
+RUN ./gradlew clean bootJar -x test --no-daemon
+
+FROM eclipse-temurin:21-jre-alpine AS runtime
+
+WORKDIR /app
+
+RUN addgroup -S spring && adduser -S spring -G spring
+
+COPY --from=build /workspace/build/libs/*.jar app.jar
+
+USER spring:spring
+
+EXPOSE 8080
+
+ENTRYPOINT ["java", "-jar", "/app/app.jar"]