Creates gitpod file

.gitpod.yml

@@ -0,0 +1,20 @@
+tasks:
+- init: ./gradlew build
+  command: |
+        if [ -z ${ADYEN_HMAC_KEY+x} ] || [[ -z ${ADYEN_API_KEY+x} ]] || [[ -z ${ADYEN_CLIENT_KEY+x} ]] || [[ -z ${ADYEN_MERCHANT_ACCOUNT+x} ]]; then
+            echo "Expected environment variables not found. Please set the ADYEN_HMAC_KEY, ADYEN_API_KEY, ADYEN_CLIENT_KEY, ADYEN_MERCHANT_ACCOUNT environment variables and rerun session https://gitpod.io/variables."
+        else
+            ./gradlew run
+        fi
+
+# exposed ports
+ports:
+- port: 8080
+  onOpen: open-preview
+
+vscode:
+  extensions:
+    - redhat.java
+    - vscjava.vscode-java-debug
+    - vscjava.vscode-java-test
+    - pivotal.vscode-spring-boot

README.md

@@ -21,6 +21,14 @@ This repository includes examples of PCI-compliant UI integrations for online pa
   * PayPal
   * Sofort
 
+## Run this integration in seconds using [Gitpod](https://gitpod.io/)
+
+* Open your [Adyen Test Account](https://ca-test.adyen.com/ca/ca/overview/default.shtml) and create a set of [API keys](https://docs.adyen.com/user-management/how-to-get-the-api-key).
+* Go to [gitpod account variables](https://gitpod.io/variables).
+* Set the `ADYEN_API_KEY`, `ADYEN_CLIENT_KEY`, `ADYEN_HMAC_KEY` and `ADYEN_MERCHANT_ACCOUNT variables`.
+* Click the button below!
+
+[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/adyen-examples/adyen-java-spring-online-payments)
 
 ## Requirements
 
@@ -52,7 +60,7 @@ The Gradle build will install the following jars from maven central
 2. Run `./gradlew run`
 3. Visit [http://localhost:8080](http://localhost:8080) and select an integration type!
 
-_NOTE: The application will also automatically pick up on the ADYEN_MERCHANT_ACCOUNT, ADYEN_API_KEY and ADYEN_CLIENT_KEY environment variables in case you do not want to create a config.properties file._ 
+_NOTE: The application will also automatically pick up on the ADYEN_MERCHANT_ACCOUNT, ADYEN_API_KEY and ADYEN_CLIENT_KEY environment variables in case you do not want to create a config.properties file._
 
 ## Contributing