add workflow with dockerfile

Author: Yanni8

.github/workflows/deploy.yml

@@ -0,0 +1,18 @@
+name: Build and Deploy Docker Image
+
+on: [push]
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Build Docker Image
+      run: |
+        docker build -t docker.pkg.github.com/yanni8/m295/app:latest .
+    - name: Login to GitHub Packages
+      run: |
+        echo "${{ secrets.GITHUB_TOKEN }}" | docker login docker.pkg.github.com -u "${{ github.actor }}" --password-stdin
+    - name: Push Docker Image
+      run: |
+        docker push docker.pkg.github.com/yanni8/m295/app:latest

Dockerfile

@@ -0,0 +1,15 @@
+FROM maven:3 as builder
+
+WORKDIR /app
+COPY . .
+RUN mvn -Dmaven.test.skip=true package 
+
+FROM openjdk:17-jdk
+
+WORKDIR /home/app
+RUN useradd -ms /bin/bash -u 999 app
+USER app
+COPY --from=builder /app/target/*.jar runner.jar
+EXPOSE 8080
+
+ENTRYPOINT ["java", "-jar", "runner.jar"]

src/main/resources/application.properties

@@ -7,7 +7,7 @@ spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.validation.V
 spring.jpa.show-sql=true
 spring.jpa.generate-ddl=true
 spring.jpa.hibernate.ddl-auto=update
-spring.datasource.url=jdbc:postgresql://${DB_URL:localhost}:${DB_PORT:5432}/demo
+spring.datasource.url=jdbc:postgresql://${DB_HOST:localhost}:${DB_PORT:5432}/demo
 spring.datasource.username=${DB_USERNAME:postgres}
 spring.datasource.password=${DB_PASSWORD:password}
 spring.datasource.driverClassName=org.postgresql.Driver