diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 018b82e..69f40c9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,97 @@
-include:
-  - project: 'martinr92/gitlab-ci'
-    file: '.gitlab-ci-gomod-build-template.yml'
+image: golang:1.16
+
+stages:
+  - test
+  - sonarcloud
+  - build
+
+checks:
+  stage: test
+  script:
+    - go fmt $(go list ./...)
+    - go vet $(go list ./...)
+
+code coverage:
+  stage: test
+  script:
+    - go install honnef.co/go/tools/cmd/staticcheck@latest
+    - go fmt $(go list ./...)
+    - go vet $(go list ./...)
+    - staticcheck ./...
+    - go test -coverprofile coverage.cov -p 1 $(go list ./...)
+    - go tool cover -html=coverage.cov -o coverage.html
+    - go tool cover -func=coverage.cov
+  coverage: '/\(statements\)\W+\d+\.\d+%/'
+  artifacts:
+    paths:
+      - coverage.cov
+      - coverage.html
+
+codecov.io:
+  stage: test
+  script:
+    - curl https://keybase.io/codecovsecurity/pgp_keys.asc | gpg --import
+    - curl -Os https://uploader.codecov.io/latest/linux/codecov
+    - curl -Os https://uploader.codecov.io/latest/linux/codecov.SHA256SUM
+    - curl -Os https://uploader.codecov.io/latest/linux/codecov.SHA256SUM.sig
+    - gpg --verify codecov.SHA256SUM.sig codecov.SHA256SUM
+    - shasum -a 256 -c codecov.SHA256SUM
+    - chmod +x codecov
+    - go test -race -coverprofile=coverage.out -covermode=atomic
+    - ./codecov -t ${CODECOV_TOKEN}
+  rules:
+    - if: $CODECOV_TOKEN
+      when: on_success
+
+# stage "sonarcloud" is only needed because of this issue:
+# https://gitlab.com/gitlab-org/gitlab/-/issues/30632
+sonarcloud-check:
+  stage: test
+  needs:
+    - checks
+  image:
+    name: sonarsource/sonar-scanner-cli:latest
+    entrypoint: [""]
+  variables:
+    SONAR_USER_HOME: "${CI_PROJECT_DIR}/.sonar"  # Defines the location of the analysis task cache
+    GIT_DEPTH: "0"  # Tells git to fetch all the branches of the project, required by the analysis task
+  cache:
+    key: "${CI_JOB_NAME}"
+    paths:
+      - .sonar/cache
+  script:
+    - sonar-scanner
+  allow_failure: true
+
+# build template
+# execute the following command for all os/arch combinations: go tool dist list
+.compile:
+  stage: build
+  # no dependencies -> no download of artifacts from previous jobs/stages
+  dependencies: []
+  script:
+    - go build .
+
+darwin-amd64:
+  extends: .compile
+  variables:
+    GOOS: "darwin"
+    GOARCH: "amd64"
+
+linux-amd64:
+  extends: .compile
+  variables:
+    GOOS: "linux"
+    GOARCH: "amd64"
+
+linux-arm64:
+  extends: .compile
+  variables:
+    GOOS: "linux"
+    GOARCH: "arm64"
+
+windows-amd64:
+  extends: .compile
+  variables:
+    GOOS: "windows"
+    GOARCH: "amd64"