feat: enable gitpod

.gitpod.Dockerfile

@@ -0,0 +1,7 @@
+FROM gitpod/workspace-full
+
+USER gitpod
+
+RUN bash -c ". /home/gitpod/.sdkman/bin/sdkman-init.sh && \
+    sdk install java 17.0.9-tem && \
+    sdk default java 17.0.9-tem"

.gitpod.yml

@@ -0,0 +1,24 @@
+# This configuration file was automatically generated by Gitpod.
+# Please adjust to your needs (see https://www.gitpod.io/docs/config-gitpod-file)
+# and commit this file to your remote git repository to share the goodness with others.
+
+image:
+    file: .gitpod.Dockerfile
+
+tasks:
+    - init: mvn package -DskipTests=false
+
+vscode:
+  extensions:
+    - redhat.java
+    - vscjava.vscode-java-debug
+    - vscjava.vscode-maven
+
+# Ports to expose on workspace startup
+ports:
+    - port: 8080
+      onOpen: open-preview
+      name: Calculator API
+      description: Calculator API init
+      visibility: private
+      protocol: http