Add API version to api/version end-point

.github/workflows/build.yml

@@ -14,7 +14,6 @@ jobs:
       uses: actions/checkout@v3
       with:
         submodules: recursive
-        token: ${{ secrets.PAT_TOKEN }}
 
     - name: Set up JDK 11
       uses: actions/setup-java@v3

src/main/java/haveno/price/ApiController.java

@@ -0,0 +1,23 @@
+package haveno.price;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.core.env.Environment;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+public class ApiController {
+
+    private final Environment env;
+
+    @GetMapping("/api/version")
+    public Map<String, String> getVersion() {
+        Map<String, String> response = new HashMap<>();
+        response.put("version", env.getProperty("haveno.price-node.api.version", ""));
+        return response;
+    }
+}

src/main/resources/application.properties

@@ -1,3 +1,4 @@
+haveno.price-node.api.version=1.0.0
 server.port=8078
 spring.jackson.serialization.indent_output=true