ci: migrate container to GitHub Actions

.github/workflows/ci-container.yml

@@ -0,0 +1,31 @@
+name: ci-container
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - Dockerfile
+  schedule:
+    - cron: '0 0 1 * *'
+  workflow_dispatch:
+    branches:
+      - master
+
+jobs:
+  latest:
+    runs-on: ubuntu-20.04
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+    - name: Log in to GitHub Docker Registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: Build container image
+      uses: docker/build-push-action@v2
+      with:
+        push: true
+        tags: ghcr.io/${{ github.repository }}/ci-container:${{ github.job }}

Dockerfile

@@ -1,6 +1,6 @@
 # This file is part of nss-tls.
 #
-# Copyright (C) 2018, 2019, 2020  Dima Krasner
+# Copyright (C) 2018, 2019, 2020, 2021  Dima Krasner
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Lesser General Public
@@ -16,7 +16,7 @@
 # License along with this library; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 
-FROM dimkr/c-dev:clang
+FROM ghcr.io/dimkr/containers/c-dev:clang
 
 RUN apt-get -qq update && apt-get -y --no-install-recommends install pkg-config libglib2.0-dev libsoup2.4-dev systemd firefox && apt-get autoremove --purge && apt-get autoclean
 RUN pip3 install selenium