docker-compose: add hot reload for backend

backend/build.gradle.kts

@@ -43,7 +43,7 @@ dependencyManagement {
 }
 
 dependencies {
-  runtimeOnly("org.springframework.boot:spring-boot-devtools:$springVersion")
+  developmentOnly("org.springframework.boot:spring-boot-devtools")
   implementation("org.springframework.boot:spring-boot-starter-data-jpa:$springVersion")
   implementation("org.springframework.boot:spring-boot-starter-data-rest:$springVersion")
   implementation("org.springframework.boot:spring-boot-starter-web:$springVersion")
@@ -99,4 +99,19 @@ tasks.named<Test>("test") {
   }
 }
 
+// for hot-reload:
+tasks.register<Copy>("getDependencies") {
+  from(sourceSets.main.get().runtimeClasspath)
+  into("runtime/")
+
+  doFirst {
+    val runtimeDir = File("runtime")
+    runtimeDir.deleteRecursively()
+    runtimeDir.mkdir()
+  }
+
+  doLast {
+    File("runtime").deleteRecursively()
+  }
+}
 

backend/src/main/resources/application.properties

@@ -35,7 +35,5 @@ sentry.proxy.port=8090
 sentry.traces-sample-rate=1.0
 sentry.environment=production
 sentry.use-git-commit-id-as-release=true
-# Set traces_sample_rate to 1.0 to capture 100%
-# of transactions for performance monitoring.
-# We recommend adjusting this value in production.
+# hot reload:
 spring.devtools.livereload.enabled=true

infra/configurations/backend/application-local.properties

@@ -5,3 +5,5 @@ sentry.enabled=false
 sentry.dsn=
 sentry.traces-sample-rate=1.0
 sentry.environment=localhost
+# hot reload:
+spring.devtools.livereload.enabled=true

infra/docker/app/DockerfileLocalBack

@@ -33,5 +33,5 @@ COPY infra/configurations/backend ./configurations/
 EXPOSE 80
 
 # Run the backend application
-CMD ./gradlew bootRun --args='--spring.profiles.active=local --spring.config.additional-location=/tmp/backend/configurations/'
+CMD (./gradlew -t :bootJar) & ./gradlew bootRun -PskipDownload=true --args='--spring.profiles.active=local --spring.config.additional-location=/tmp/backend/configurations/'