Update .gitlab-ci.yml, README.md

.gitlab-ci.yml

+image: docker-registry.xx.network/elixxir/sysadmin/backend-ci:go1.17-wasm
+
+build:
+    stage: build
+    script:
+        - GOOS=js GOARCH=wasm go build -o xxdk.wasm
+
+native-test:
+    stage: test
+    script:
+        - GOOS=js GOARCH=wasm go test ./...

README.md

@@ -74,4 +74,4 @@ global.Go = class {
         }
     }
 }
-```
\ No newline at end of file
+```