Initialize Spring Boot application with HTTPS support and add Docker configuration

Helper_projects/spring-boot-https-main/src/main/java/https/SpringBootHttpsApplication.java

@@ -0,0 +1,20 @@
+package https;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+@RestController
+public class SpringBootHttpsApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootHttpsApplication.class, args);
+    }
+
+    @GetMapping("/hello")
+    public String hello() {
+        return "Hello World! 🚀";
+    }
+}

Helper_projects/spring-boot-https-main/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+server.ssl.enabled=true
+server.ssl.certificate=${FULLCHAINPEM}
+server.ssl.certificate-private-key=${PRIVKEYPEM}

Helper_projects/spring-boot-https-main/src/main/resources/application.yml

@@ -0,0 +1,5 @@
+server:
+  ssl:
+    enabled: true
+    certificate: ${FULLCHAINPEM}
+    certificate-private-key: ${PRIVKEYPEM}