Add .env.example and add eureka client

pom.xml

@@ -33,6 +33,7 @@
         <retrofit.version>3.0.0</retrofit.version>
         <spring-dotenv.version>4.0.0</spring-dotenv.version>
         <springdoc-openapi-starter.version>2.8.9</springdoc-openapi-starter.version>
+        <spring-eureka-client.version>4.3.0</spring-eureka-client.version>
     </properties>
     <dependencies>
         <dependency>
@@ -60,6 +61,11 @@
             <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
             <version>${springdoc-openapi-starter.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
+            <version>${spring-eureka-client.version}</version>
+        </dependency>
 
         <dependency>
             <groupId>org.springframework.boot</groupId>