Adding codecov.io (#48)

Author: tobiasehlert

.github/workflows/codecov.yml

@@ -0,0 +1,30 @@
+name: codecov.io
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    name: Code building and testing
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ^1.17
+
+      - name: Running build from src/*.go
+        run: |
+          go build -o application src/*.go
+
+      - name: Runing tests for coverage
+        run: |
+          go test -race -coverprofile=coverage.out -covermode=atomic `go list ./... | grep -v vendor/`
+
+      - name: Uploading coverage to Codecov
+        run: |
+          bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,6 +1,7 @@
 # TibiaData API in Golang
 
 [![GitHub CI](https://github.com/TibiaData/tibiadata-api-go/workflows/build/badge.svg?branch=main)](https://github.com/TibiaData/tibiadata-api-go/actions?query=workflow%3Abuild)
+[![Codecov](https://codecov.io/gh/TibiaData/tibiadata-api-go/branch/main/graph/badge.svg?token=PSBNLBI10C)](https://codecov.io/gh/TibiaData/tibiadata-api-go)
 [![GitHub go.mod version](https://img.shields.io/github/go-mod/go-version/tibiadata/tibiadata-api-go)](https://github.com/tibiadata/tibiadata-api-go/blob/main/go.mod)
 [![Docker version](https://img.shields.io/docker/v/tibiadata/tibiadata-api-go/latest)](https://hub.docker.com/r/tibiadata/tibiadata-api-go)
 [![Docker size](https://img.shields.io/docker/image-size/tibiadata/tibiadata-api-go/latest)](https://hub.docker.com/r/tibiadata/tibiadata-api-go)