Add more docker platforms

.github/workflows/docker.yaml

@@ -1,23 +1,38 @@
-name: Docker Image CI
+name: Build on master push
 
-on: workflow_dispatch
+on:
+  push:
+    branches:
+      - master
 
-jobs:
+env:
+  DOCKER_CLI_EXPERIMENTAL: enabled
 
+jobs:
   build:
-
+    name: Build Docker image
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v2
-    - name: docker login
-      uses: docker/login-action@v2
-      with:
-        username: ${{ secrets.DOCKER_USERNAME }}
-        password: ${{ secrets.DOCKER_TOKEN }}
+      - name: docker login
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_TOKEN }}
+
+      - name: Checkout project
+        uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        id: qemu
 
-    - name: build the Docker image
-      run: docker build -t groestlcoin/groestlcoind:latest .
+      - name: Setup Docker buildx action
+        uses: docker/setup-buildx-action@v1
+        id: buildx
 
-    - name: docker push
-      run: docker push groestlcoin/groestlcoind:latest
+      - name: Run Docker buildx
+        run: |
+          docker buildx build \
+          --platform linux/arm64,linux/amd64,linux/arm/v7 \
+          --tag groestlcoin/groestlcoind:latest \
+          --output "type=registry" .

Dockerfile

@@ -2,17 +2,8 @@
 # Alpine would be nice, but it's linked again musl and breaks the groestlcoin core download binary
 #FROM alpine:latest
 
-FROM ubuntu:latest AS builder
-ARG TARGETARCH
-
-FROM builder AS builder_amd64
-ENV ARCH=x86_64
-FROM builder AS builder_arm64
-ENV ARCH=aarch64
-FROM builder AS builder_riscv64
-ENV ARCH=riscv64
-
-FROM builder_${TARGETARCH} AS build
+FROM ubuntu:latest as builder
+ARG TARGETPLATFORM
 
 # Testing: gosu
 #RUN echo "http://dl-cdn.alpinelinux.org/alpine/edge/testing/" >> /etc/apk/repositories \
@@ -34,13 +25,16 @@ ARG GROESTLCOIN_CORE_SIGNATURE=287AE4CA1187C68C08B49CB2D11BD4F33F1DB499
 # 3. Verifying pkg signature from main website should inspire confidence and reduce chance of surprises.
 # Instead fetch, verify, and extract to Docker image
 RUN cd /tmp \
+    && if [ "${TARGETPLATFORM}" = "linux/amd64" ]; then export TARGETPLATFORM=x86_64-linux-gnu; fi \
+    && if [ "${TARGETPLATFORM}" = "linux/arm64" ]; then export TARGETPLATFORM=aarch64-linux-gnu; fi \
+    && if [ "${TARGETPLATFORM}" = "linux/arm/v7" ]; then export TARGETPLATFORM=arm-linux-gnueabihf; fi \
     && gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys ${GROESTLCOIN_CORE_SIGNATURE} \
     && wget https://github.com/Groestlcoin/groestlcoin/releases/download/v${VERSION}/SHA256SUMS.asc \
     https://github.com/Groestlcoin/groestlcoin/releases/download/v${VERSION}/SHA256SUMS \
-    https://github.com/Groestlcoin/groestlcoin/releases/download/v${VERSION}/groestlcoin-${VERSION}-${ARCH}-linux-gnu.tar.gz \
+    https://github.com/Groestlcoin/groestlcoin/releases/download/v${VERSION}/groestlcoin-${VERSION}-${TARGETPLATFORM}.tar.gz \
     && gpg --verify --status-fd 1 --verify SHA256SUMS.asc SHA256SUMS 2>/dev/null | grep "^\[GNUPG:\] VALIDSIG.*${GROESTLCOIN_CORE_SIGNATURE}\$" \
-    && sha256sum --ignore-missing --check SHA25SUM \
-    && tar -xzvf groestlcoin-${VERSION}-${ARCH}-linux-gnu.tar.gz -C /opt \
+    && sha256sum --ignore-missing --check SHA256SUMS \
+    && tar -xzvf groestlcoin-${VERSION}-${TARGETPLATFORM}.tar.gz -C /opt \
     && ln -sv groestlcoin-${VERSION} /opt/groestlcoin \
     && rm -v /opt/groestlcoin/bin/groestlcoin-qt
 
@@ -58,7 +52,7 @@ ARG USER_ID=1000
 RUN groupadd -g ${GROUP_ID} groestlcoin \
     && useradd -u ${USER_ID} -g groestlcoin -d /groestlcoin groestlcoin
 
-COPY --from=build /opt/ /opt/
+COPY --from=builder /opt/ /opt/
 
 RUN apt update \
     && apt install -y --no-install-recommends gosu libatomic1 \