Docker error fixed --renamed the file

.github/workflows/gradle.yml

@@ -0,0 +1,32 @@
+name: Java CI with Gradle
+
+on: [push,pull_request]
+
+jobs:
+  build-java:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Grant execute permission for gradlew
+        run: chmod +x gradlew
+
+      - name: Build with Gradle
+        run: ./gradlew build
+
+      - name: Build and Push Docker Image
+        uses: mr-smithers-excellent/docker-build-push@v4
+        with:
+          image: sudarshan2504/demoapp
+          tag: latest
+          registry: docker.io
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+

Dockerfile

@@ -2,7 +2,8 @@ FROM openjdk:8-jre-alpine
 
 EXPOSE 8080
 
-COPY ./build/libs/my-app-1.0-SNAPSHOT.jar /usr/app/
+COPY ./build/libs/java-app-1.0-SNAPSHOT.jar /usr/app/
 WORKDIR /usr/app
 
 ENTRYPOINT ["java", "-jar", "my-app-1.0-SNAPSHOT.jar"]
+

README.md

@@ -6,7 +6,7 @@
 
     docker build -t java-app .
 
-##### push image to repo 
+##### rest are automated in cicd yaml
 
-    docker tag java-app demo-app:java-1.0
+    check the tags and name you will be building and pushing to.