✨ feat(api): Add AWS S3 Config, S3 Service (#221)

* ✨ feat(api): Add AWS S3 Config, S3 Service

* ✨ feat(api): remove hard coding strings

backend/streetdrop-api/build.gradle

@@ -34,6 +34,7 @@ dependencies {
     annotationProcessor "jakarta.persistence:jakarta.persistence-api"
 
     implementation 'org.springframework.boot:spring-boot-starter-webflux'
+    implementation 'io.awspring.cloud:spring-cloud-starter-aws:2.3.1'
 }
 
 test {

backend/streetdrop-api/src/main/java/com/depromeet/external/aws/s3/AwsS3Config.java

@@ -0,0 +1,36 @@
+package com.depromeet.external.aws.s3;
+
+import com.amazonaws.auth.AWSStaticCredentialsProvider;
+import com.amazonaws.auth.BasicAWSCredentials;
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.AmazonS3ClientBuilder;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class AwsS3Config {
+
+	@Value("${cloud.aws.credentials.access-key}")
+	private String accessKey;
+
+	@Value("${cloud.aws.credentials.secret-key}")
+	private String secretKey;
+
+	@Value("${cloud.aws.s3.region.static}")
+	private String region;
+
+
+	@Bean
+	public BasicAWSCredentials basicAWSCredentials() {
+		return new BasicAWSCredentials(accessKey, secretKey);
+	}
+
+	@Bean
+	public AmazonS3 amazonS3(BasicAWSCredentials basicAWSCredentials) {
+		return AmazonS3ClientBuilder.standard()
+				.withRegion(region)
+				.withCredentials(new AWSStaticCredentialsProvider(basicAWSCredentials))
+				.build();
+	}
+}

backend/streetdrop-api/src/main/java/com/depromeet/external/aws/s3/AwsS3Service.java

@@ -0,0 +1,23 @@
+package com.depromeet.external.aws.s3;
+
+import com.amazonaws.services.s3.AmazonS3;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class AwsS3Service {
+	private final AmazonS3 amazonS3;
+
+	@Value("${cloud.aws.s3.bucket}")
+	private String bucket;
+
+	public String getS3(String bucket, String fileName) {
+		return amazonS3.getUrl(bucket, fileName).toString();
+	}
+
+	public String getS3FilePaths() {
+		return bucket;
+	}
+}