[#21] Add sample CodeCov config for private repo

.template/README.md

@@ -1,5 +1,7 @@
 # Flutter Templates
 
+[![codecov](https://codecov.io/gh/nimblehq/flutter_templates/branch/main/graph/badge.svg?token=ATUNXDX218)](https://codecov.io/gh/nimblehq/flutter_templates)
+
 All the templates that can be used to kick off a new Flutter application quickly.
 
 ## Usage
@@ -50,6 +52,10 @@ Clone the repository
 
     `$ fvm flutter drive --driver=test_driver/integration_test.dart --target=integration_test/my_home_page_test.dart --flavor staging`
 
+- Code coverage integration:
+
+  - CodeCov: for the private repository, we need to set up a [TeamBot](https://docs.codecov.com/docs/team-bot) in `codecov.yml`.
+
 ## License
 
 This project is Copyright (c) 2014 and onwards. It is free software,

.template/codecov.yml

@@ -0,0 +1,26 @@
+# Sample CodeCov config for private repository
+codecov:
+  bot: luongvo
+  require_ci_to_pass: yes
+
+coverage:
+  status:
+    project: off
+    patch: off
+
+parsers:
+  gcov:
+    branch_detection:
+      conditional: yes
+      loop: yes
+      method: no
+      macro: no
+
+comment:
+  layout: "reach,diff,flags,files,tree"
+  behavior: default
+  require_changes: no
+
+ignore:
+  - "lib/di"
+  - "lib/gen"