add github action

frontend/lib/api/api_client.dart

@@ -2,7 +2,7 @@ import 'package:dio/dio.dart';
 import 'package:flutter/foundation.dart';
 
 class ApiClient {
-  static const String _apiBase = kDebugMode ? "http://localhost:8081" : "";
+  static const String _apiBase = !kDebugMode ? "http://localhost:8081/api" : "api";
   final Dio _dio = Dio(BaseOptions(baseUrl: _apiBase));
 
   String? token;

frontend/lib/api/builds.dart

@@ -10,4 +10,18 @@ extension BuildsAPI on ApiClient {
         responseObject.map((e) => Build.fromJson(e)).toList(growable: false);
     return packages;
   }
+
+  Future<Build> getBuild(int id) async {
+    final resp = await getRawClient().get("/builds/${id}");
+    return Build.fromJson(resp.data);
+  }
+
+  Future<String> getOutput({int? line, required int buildID}) async {
+    String uri = "/builds/output?buildid=$buildID";
+    if (line != null) {
+      uri += "&startline=$line";
+    }
+    final resp = await getRawClient().get(uri);
+    return resp.data.toString();
+  }
 }

frontend/lib/api/packages.dart

@@ -4,9 +4,6 @@ import 'api_client.dart';
 extension PackagesAPI on ApiClient {
   Future<List<Package>> listPackages() async {
     final resp = await getRawClient().get("/packages/list");
-    print(resp.data);
-
-    // todo error handling
 
     final responseObject = resp.data as List;
     final List<Package> packages =