Containerization of App using Docker

.dockerignore

@@ -0,0 +1,11 @@
+target/
+.mvn/
+.idea/
+*.iml
+.classpath
+.project
+.settings/
+.git/
+node_modules/
+logs/
+*.log

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "java.compile.nullAnalysis.mode": "automatic"
+}

Docker-README.md

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+# Inventory Management Tool - Docker Setup
+
+This project is a Spring Boot application. The repository includes a multi-stage `Dockerfile` that builds the app with Maven and produces a runtime image. A `docker-compose.yml` is provided to run the service together with a MySQL database.
+
+---
+
+## Quick Commands
+
+```bash
+# Build Docker image
+docker build -t im-app:latest .
+
+# Run the Docker image
+docker run --rm -p 8082:8082 \
+  -e SPRING_DATASOURCE_URL='jdbc:mysql://<host>:3306/inventory_db?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC' \
+  -e SPRING_DATASOURCE_USERNAME=root \
+  -e SPRING_DATASOURCE_PASSWORD=Anjana@3176 \
+  im-app:latest
+
+# Start using Docker Compose
+docker compose up --build
+
+# Stop Docker Compose
+docker compose down
+
+# View logs
+docker compose logs -f

Dockerfile

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+# ---------- STAGE 1: Build ----------
+FROM maven:3.9.8-eclipse-temurin-21 AS builder
+WORKDIR /app
+
+COPY pom.xml .
+RUN mvn dependency:go-offline
+
+COPY src ./src
+RUN mvn clean package -DskipTests
+
+# ---------- STAGE 2: Runtime ----------
+FROM eclipse-temurin:21-jdk
+WORKDIR /app
+
+# Install netcat (for wait-for-it.sh)
+RUN apt-get update && apt-get install -y netcat-openbsd && rm -rf /var/lib/apt/lists/*
+
+# Copy jar and wait script
+COPY --from=builder /app/target/*.jar app.jar
+COPY wait-for-it.sh .
+RUN chmod +x wait-for-it.sh
+
+EXPOSE 8082
+
+ENTRYPOINT ["java", "-jar", "app.jar"]

README.md

@@ -45,6 +45,12 @@ spring.datasource.username=your_username
 
 spring.datasource.password=your_password
 
+🌏 Docker Hub Image
+
+You can directly pull and run the pre-built image from Docker Hub:
+
+docker pull atulsingh17/opcode-inventorymanagement:1.0
+docker run -p 8080:8082 atulsingh17/opcode-inventorymanagement:1.0
 
 3. **Build and run**
  ```bash

docker-compose.yml

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+version: "3.9"
+
+services:
+  db:
+    image: mysql:8.0
+    container_name: mysql-db
+    environment:
+      MYSQL_ROOT_PASSWORD: Anjana@3176
+      MYSQL_DATABASE: inventory_db
+    #  MYSQL_USER: root
+     # MYSQL_PASSWORD: Anjana@3176
+    #ports:
+   #   - "3306:3306"
+    volumes:
+      - mysql_data:/var/lib/mysql
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-pAnjana@3176"]
+      interval: 5s
+      timeout: 10s
+      retries: 10
+
+  app:
+    build: .
+    container_name: inventory-app
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      SPRING_DATASOURCE_URL: jdbc:mysql://db:3306/inventory_db?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
+      SPRING_DATASOURCE_USERNAME: root
+      SPRING_DATASOURCE_PASSWORD: Anjana@3176
+    ports:
+      - "8080:8082"
+    command: ["./wait-for-it.sh", "db", "3306", "--", "java", "-jar", "app.jar"]
+
+volumes:
+  mysql_data:

src/main/resources/application.properties

@@ -1,5 +1,5 @@
 # Database
-spring.datasource.url=jdbc:mysql://localhost:3306/inventory_db?allowPublicKeyRetrieval=true&useSSL=false
+spring.datasource.url=jdbc:mysql://db:3306/inventory_db?allowPublicKeyRetrieval=true&useSSL=false&serverTimezone=UTC
 spring.datasource.username=root
 spring.datasource.password=Anjana@3176
 
@@ -11,10 +11,3 @@ spring.jpa.properties.hibernate.format_sql=true
 
 # Server
 server.port=8082
-
-
-# JWT
-#abhay
-# jwt.secret=your-secret-key
-# jwt.expiration=86400000 # 24 hours in milliseconds
-#lol

target/classes/application.properties

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+# Database
+spring.datasource.url=jdbc:mysql://db:3306/inventory_db?allowPublicKeyRetrieval=true&useSSL=false&serverTimezone=UTC
+spring.datasource.username=root
+spring.datasource.password=Anjana@3176
+
+# JPA/Hibernate
+spring.jpa.hibernate.ddl-auto=update
+spring.jpa.show-sql=true
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQLDialect
+spring.jpa.properties.hibernate.format_sql=true
+
+# Server
+server.port=8082

wait-for-it.sh

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+#!/usr/bin/env bash
+# wait-for-it.sh
+# Use this script to test if a given TCP host/port are available
+
+set -e
+
+HOST="$1"
+PORT="$2"
+shift 2
+CMD="$@"
+
+echo "⏳ Waiting for $HOST:$PORT to be available..."
+
+while ! nc -z "$HOST" "$PORT"; do
+  echo "MySQL at $HOST:$PORT not yet available..."
+  sleep 3
+done
+
+echo "✅ $HOST:$PORT is available — starting application..."
+exec $CMD