[#6] docs : 백엔드 디렉토리 생성 및 프로젝트 초기 설정

- devlop branch에 백엔드 디렉토리 생성

- spring - boot 초기 설정

- .git ignore 설정

# 본문 작성

# 꼬릿말은 아래에 작성 : ex) #이슈 번호

# --COMMIT END--
# <타입> 리스트
# feat : 기능 (새로운 기능)
# fix : 버그 (버그 수정)
# refactor : 리팩토링
# style : 스타일(코드 형식, 세미콜론 추가 : 비지니스 로직 변경 X)
# docs : 문서 (문서 추가, 수정, 삭제)
# test : 테스트 (테스트 코드 추가, 수정, 삭제 : 비지니스 로직 변경 X)
# chroe : 기타 변경사항(빌드 스크립트 수정 등)
-------------------------
#	제목 첫 글자 대문자
#	제목은 명령문
#	제목 끝에 마침표(.) 금지
#	제목과 본문을 한 줄 띄워 분리하기
#	본문은 "어떻게" 보다 "무엇을" , "왜"를 설명한다
#	본문에 여러줄의 메시지를 작성할 땐 "-"로 구분
-------------------------

BE/.gitignore

@@ -0,0 +1,165 @@
+
+# Created by https://www.gitignore.io/api/java,macos,gradle,intellij
+# Edit at https://www.gitignore.io/?templates=java,macos,gradle,intellij
+
+### Intellij ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and WebStorm
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+### Intellij Patch ###
+# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
+
+# *.iml
+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+.idea/**/sonarlint/
+
+# SonarQube Plugin
+.idea/**/sonarIssues.xml
+
+# Markdown Navigator plugin
+.idea/**/markdown-navigator.xml
+.idea/**/markdown-navigator/
+
+### Java ###
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### Gradle ###
+.gradle
+build/
+
+# Ignore Gradle GUI config
+gradle-app.setting
+
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
+
+# Cache of project
+.gradletasknamecache
+
+# # Work around https://youtrack.jetbrains.com/issue/IDEA-116898
+# gradle/wrapper/gradle-wrapper.properties
+
+### Gradle Patch ###
+**/build/
+
+# End of https://www.gitignore.io/api/java,macos,gradle,intellij

BE/HELP.md

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+# Getting Started
+
+### Reference Documentation
+For further reference, please consider the following sections:
+
+* [Official Gradle documentation](https://docs.gradle.org)
+* [Spring Boot Gradle Plugin Reference Guide](https://docs.spring.io/spring-boot/docs/2.2.6.RELEASE/gradle-plugin/reference/html/)
+* [Spring Web](https://docs.spring.io/spring-boot/docs/2.2.6.RELEASE/reference/htmlsingle/#boot-features-developing-web-applications)
+* [Spring Boot DevTools](https://docs.spring.io/spring-boot/docs/2.2.6.RELEASE/reference/htmlsingle/#using-boot-devtools)
+* [Thymeleaf](https://docs.spring.io/spring-boot/docs/2.2.6.RELEASE/reference/htmlsingle/#boot-features-spring-mvc-template-engines)
+* [Spring Data JDBC](https://docs.spring.io/spring-data/jdbc/docs/current/reference/html/)
+
+### Guides
+The following guides illustrate how to use some features concretely:
+
+* [Building a RESTful Web Service](https://spring.io/guides/gs/rest-service/)
+* [Serving Web Content with Spring MVC](https://spring.io/guides/gs/serving-web-content/)
+* [Building REST services with Spring](https://spring.io/guides/tutorials/bookmarks/)
+* [Handling Form Submission](https://spring.io/guides/gs/handling-form-submission/)
+* [Using Spring Data JDBC](https://github.com/spring-projects/spring-data-examples/tree/master/jdbc/basics)
+
+### Additional Links
+These additional references should also help you:
+
+* [Gradle Build Scans – insights for your project's build](https://scans.gradle.com#gradle)
+

BE/build.gradle

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+plugins {
+    id 'org.springframework.boot' version '2.2.6.RELEASE'
+    id 'io.spring.dependency-management' version '1.0.9.RELEASE'
+    id 'java'
+}
+
+group = 'com.codesquad'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '1.8'
+
+configurations {
+    developmentOnly
+    runtimeClasspath {
+        extendsFrom developmentOnly
+    }
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-data-jdbc'
+    implementation 'org.springframework.boot:spring-boot-starter-thymeleaf'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    compileOnly 'org.projectlombok:lombok'
+    developmentOnly 'org.springframework.boot:spring-boot-devtools'
+    runtimeOnly 'com.h2database:h2'
+    annotationProcessor 'org.projectlombok:lombok'
+    testImplementation('org.springframework.boot:spring-boot-starter-test') {
+        exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
+    }
+}
+
+test {
+    useJUnitPlatform()
+}

BE/gradle/wrapper/gradle-wrapper.properties

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+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists