add :: imageUpload api 추가

src/main/java/com/mindway/server/v2/domain/image/presentation/ImageController.java

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+package com.mindway.server.v2.domain.image.presentation;
+
+import com.mindway.server.v2.domain.image.presentation.dto.response.ImageUploadResponseDto;
+import com.mindway.server.v2.domain.image.service.ImageUploadService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestPart;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
+
+@RestController
+@RequiredArgsConstructor
+public class ImageController {
+
+    private final ImageUploadService imageUploadService;
+
+    @PostMapping
+    public ResponseEntity<ImageUploadResponseDto> uploadImage(@RequestPart MultipartFile image) {
+        ImageUploadResponseDto response = imageUploadService.execute(image);
+        return ResponseEntity.ok(response);
+    }
+}

src/main/java/com/mindway/server/v2/domain/image/presentation/dto/response/ImageUploadResponseDto.java

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+package com.mindway.server.v2.domain.image.presentation.dto.response;
+
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+public class ImageUploadResponseDto {
+    private String img_url;
+}

src/main/java/com/mindway/server/v2/domain/image/service/ImageUploadService.java

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+package com.mindway.server.v2.domain.image.service;
+
+import com.mindway.server.v2.domain.image.presentation.dto.response.ImageUploadResponseDto;
+import org.springframework.web.multipart.MultipartFile;
+
+public interface ImageUploadService {
+    ImageUploadResponseDto execute(MultipartFile image);
+}

src/main/java/com/mindway/server/v2/domain/image/service/impl/ImageUploadServiceImpl.java

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+package com.mindway.server.v2.domain.image.service.impl;
+
+import com.mindway.server.v2.domain.image.presentation.dto.response.ImageUploadResponseDto;
+import com.mindway.server.v2.domain.image.service.ImageUploadService;
+import com.mindway.server.v2.domain.image.util.ImageConverter;
+import com.mindway.server.v2.global.annotation.ServiceWithTransaction;
+import com.mindway.server.v2.global.thirdparty.aws.S3Util;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.multipart.MultipartFile;
+
+@ServiceWithTransaction
+@RequiredArgsConstructor
+public class ImageUploadServiceImpl implements ImageUploadService {
+
+    private final S3Util s3Util;
+    private final ImageConverter imageConverter;
+
+    public ImageUploadResponseDto execute(MultipartFile image) {
+        String img_url = s3Util.imageUpload(image);
+        return imageConverter.toDto(img_url);
+    }
+}

src/main/java/com/mindway/server/v2/domain/image/util/ImageConverter.java

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+package com.mindway.server.v2.domain.image.util;
+
+import com.mindway.server.v2.domain.image.presentation.dto.response.ImageUploadResponseDto;
+
+public interface ImageConverter {
+    ImageUploadResponseDto toDto(String img_url);
+}

src/main/java/com/mindway/server/v2/domain/image/util/impl/ImageConverterImpl.java

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+package com.mindway.server.v2.domain.image.util.impl;
+
+import com.mindway.server.v2.domain.image.presentation.dto.response.ImageUploadResponseDto;
+import com.mindway.server.v2.domain.image.util.ImageConverter;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ImageConverterImpl implements ImageConverter {
+
+    public ImageUploadResponseDto toDto(String img_url) {
+        return ImageUploadResponseDto.builder()
+                .img_url(img_url)
+                .build();
+    }
+}