Automate pushing dockerbuild image to ghcr.io (#598)

.github/workflows/dockerbuild.yaml

@@ -0,0 +1,43 @@
+name: Dockerbuild
+on:
+    workflow_dispatch: {}
+    push:
+        branches: [master, develop]
+        paths:
+            - "dockerbuild/**"
+concurrency: ${{ github.workflow }}-${{ github.ref_name }}
+env:
+    REGISTRY: ghcr.io
+    IMAGE_NAME: ${{ github.repository }}-dockerbuild
+jobs:
+    build:
+        name: Docker Build
+        runs-on: ubuntu-latest
+        permissions:
+            contents: read
+            packages: write
+        steps:
+            - uses: actions/checkout@v3
+
+            - name: Log in to the Container registry
+              uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            - name: Extract metadata for Docker
+              id: meta
+              uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+                  tags: |
+                      type=ref,event=branch
+
+            - name: Build and push Docker image
+              uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+              with:
+                  context: dockerbuild
+                  push: true
+                  tags: ${{ steps.meta.outputs.tags }}
+                  labels: ${{ steps.meta.outputs.labels }}

dockerbuild/Dockerfile

@@ -1,8 +1,9 @@
+# Docker image to facilitate building Element Desktop with native bits using a glibc version with broader compatibility
 FROM buildpack-deps:bionic-curl
 
 ENV DEBIAN_FRONTEND noninteractive
 
-RUN curl -L https://yarnpkg.com/latest.tar.gz | tar xvz && mv yarn-* /yarn && ln -s /yarn/bin/yarn /usr/bin/yarn
+RUN curl --proto "=https" -L https://yarnpkg.com/latest.tar.gz | tar xvz && mv yarn-* /yarn && ln -s /yarn/bin/yarn /usr/bin/yarn
 RUN apt-get -qq update && apt-get -qq dist-upgrade && \
   # add repo for git-lfs
   curl -s https://packagecloud.io/install/repositories/github/git-lfs/script.deb.sh | bash && \
@@ -14,6 +15,8 @@ RUN apt-get -qq update && apt-get -qq dist-upgrade && \
   apt-get -qq install --no-install-recommends qtbase5-dev bsdtar build-essential autoconf libssl-dev gcc-multilib g++-multilib lzip rpm python libcurl4 git git-lfs ssh unzip tcl \
   libsecret-1-dev libgnome-keyring-dev \
   libopenjp2-tools \
+  # Used by github actions \
+  jq \
   # Used by seshat (when not SQLCIPHER_STATIC) \
   libsqlcipher-dev && \
   # git-lfs
@@ -34,7 +37,7 @@ ENV FORCE_COLOR true
 ENV NODE_VERSION 16.18.1
 
 # this package is used for snapcraft and we should not clear apt list - to avoid apt-get update during snap build
-RUN curl -L https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.gz | tar xz -C /usr/local --strip-components=1 && \
+RUN curl --proto "=https" -L https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.gz | tar xz -C /usr/local --strip-components=1 && \
   unlink /usr/local/CHANGELOG.md && unlink /usr/local/LICENSE && unlink /usr/local/README.md && \
   # https://github.com/npm/npm/issues/4531
   npm config set unsafe-perm true