Add basic CI

.gitlab-ci.yml

@@ -8,8 +8,8 @@ build:
   image: alpine:latest
   tags: [docker]
   before_script:
-    - sed -i '/edge/s/^#//' /etc/apk/repositories
-    - apk update && apk add clang-extra-tools meson git python3 py3-pip py3-flask lcov gcovr libcurl libevent grep
+    - echo 'https://dl-cdn.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories
+    - apk update && apk add clang-extra-tools meson git python3 py3-pip py3-flask lcov gcovr libcurl libevent grep g++
     - export PATH="$PATH:/root/.local/bin"
     - pip3 install --user reuse
   script: