ci: setup codecov

.github/workflows/api.yml

@@ -78,4 +78,8 @@ jobs:
         with:
           environment: production
           set_commits: skip
-          version: ${{ github.sha }}
+          version: ${{ github.sha }}
+
+      - uses: codecov/codecov-action@v2
+        with:
+          flags: api

.github/workflows/pr.yml

@@ -121,4 +121,8 @@ jobs:
           languages: go
 
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v1
+        uses: github/codeql-action/analyze@v1
+
+      - uses: codecov/codecov-action@v2
+        with:
+          flags: api