include spring-devtools and doc howto use them

README.md

@@ -38,3 +38,14 @@ Running the tests requires internet access and the services at https://textgridl
 
 Test output is written to `build/reports/tests/test/index.html`
 
+## Development Server / Continuous Build
+
+The gradle build file has the spring-boot-devtools included, which (allow live reloading when classpath changes)[https://docs.spring.io/spring-boot/docs/current/reference/html/howto.html#howto-hotswapping]. This works fine when web resources like jsp files or the classpath change. It does not include automatic recompilation when Java code changes. This is what you IDE may do, or gradle with its (continuous build feature)[https://blog.gradle.org/introducing-continuous-build].
+
+For the latter i recommend to open two terminal windows too run two commands parallel. One for the continuous build:
+
+        ./gradlew classes -t
+
+and one for running the spring-boot dev server:
+
+        ./gradlew bootRun

build.gradle

@@ -28,6 +28,7 @@ dependencies {
     implementation 'com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider'
     implementation 'com.atlassian.commonmark:commonmark:0.14.0'
     implementation 'info.textgrid.middleware.clients:textgrid-clients:3.4.3'
+    developmentOnly("org.springframework.boot:spring-boot-devtools")
     testImplementation('org.springframework.boot:spring-boot-starter-test') {
         exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
     }