chore: scaffold linhelp applications

backend/src/main/resources/application-dev.yml

@@ -0,0 +1,26 @@
+spring:
+  datasource:
+    url: jdbc:mysql://localhost:3306/linhelp?useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai
+    username: linhelp
+    password: linhelp
+  redis:
+    host: localhost
+    port: 6379
+  flyway:
+    enabled: true
+    locations: classpath:db/migration
+
+mybatis-plus:
+  configuration:
+    map-underscore-to-camel-case: true
+
+sa-token:
+  token-name: Authorization
+  timeout: 2592000
+
+linhelp:
+  storage:
+    endpoint: http://localhost:9000
+    access-key: linhelp
+    secret-key: linhelp123
+    bucket: linhelp