Add dockerfile and publish functionality

.github/workflows/gradle-ghcr-cicd.yml

@@ -0,0 +1,90 @@
+name: Java CI CD
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+  release:
+    types: [published]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@af1da67850ed9a4cedd57bfd976089dd991e2582
+
+      - name: Build with Gradle
+        run: ./gradlew build
+
+  dependency-submission:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Generate and submit dependency graph
+        uses: gradle/actions/dependency-submission@af1da67850ed9a4cedd57bfd976089dd991e2582
+
+  push-to-ghcr:
+    name: Push image to ghcr
+    runs-on: ubuntu-latest
+    needs: build
+    if: github.event_name == 'push' || github.event_name == 'release'
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Log in to container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=raw,value=latest
+            type=semver,pattern={{version}}
+
+      - name: Build and push image
+        id: push
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+
+      - name: Generate attestation
+        uses: actions/attest-build-provenance@v2
+        with:
+          subject-name: ghcr.io/${{ github.repository }}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          push-to-registry: true

Dockerfile

@@ -0,0 +1,25 @@
+# Copyright (c) 2025 Dan Sirbu
+#
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+FROM gradle:jdk21 AS build
+WORKDIR /app
+COPY build.gradle ./build.gradle
+COPY gradle ./gradle
+COPY gradlew ./gradlew
+COPY settings.gradle ./settings.gradle
+RUN chmod +x ./gradlew
+
+# Download dependencies
+RUN ./gradlew dependencies
+
+# Copy source code and build jar
+COPY src ./src
+RUN ./gradlew bootJar
+
+FROM eclipse-temurin:21-jdk
+WORKDIR /app
+COPY --from=build /app/build/libs/*.jar ./app.jar
+EXPOSE 8080
+
+ENTRYPOINT [ "java", "-jar", "./app.jar" ]

README.md

@@ -36,6 +36,19 @@ Here is a short guide on how to run this project on your pc:
 Inside the root directory of the project run
 ``.\gradlew bootRun --args='--spring.profiles.active=dev'``.
 This command starts the backend with the dev profile active
+## Using the docker container
+In order to use the docker container, you only need docker installed.
+First you have to build image with ``docker build -t simple-store:latest .``
+
+And then run the image, while defining the needed environment variables (see [.env.template](.env.template)).
+Any arguments added to the end will be appended to the program (useful for setting spring boot profiles)
+### Running using .env file
+If you have an .env file, then in order to run the container just do
+``docker run --name simple-store-backend --env-file LOCATION_OF_ENV_FILE -p 8080:8080 simple-store:latest``
+## Running without .env file
+If you do not have an .env file, then you will have to define all the needed environment variables yourself.
+Here is how to run the container without an .env file:
+``docker run --name simple-store-backend -e ENV_VAR1=VAL1 -e ENV_VAR2=VAL2 ... -p 8080:8080 simple-store:latest``
 
 # 📡 API Documentation
 - The API is documented using **Swagger**