add linux/arm/v7 ; improve build & runtime

.github/workflows/deploy.yml

@@ -49,7 +49,7 @@ jobs:
       name: Set up QEMU
       uses: docker/setup-qemu-action@v2
       with:
-        platforms: amd64,arm64
+        platforms: amd64,arm64,arm32
     -
       name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v2
@@ -70,6 +70,6 @@ jobs:
         file       : ./Dockerfile
         tags       : ${{ steps.meta.outputs.tags }}
         labels     : ${{ steps.meta.outputs.labels }}
-        platforms  : linux/amd64,linux/arm64
+        platforms  : linux/amd64,linux/arm/v7,linux/arm64/v8
         cache-from : type=gha,scope=${{ github.workflow }}
         cache-to   : type=gha,scope=${{ github.workflow }},mode=max

Dockerfile

@@ -1,29 +1,51 @@
 ################################################################################
 ##################################################################   build   ###
 
-FROM  mcr.microsoft.com/dotnet/sdk:6.0  as  build
+FROM  --platform=linux/amd64  mcr.microsoft.com/dotnet/sdk:6.0  as  build
 
 WORKDIR  /app/
 
 COPY  ./Server/  ./Server/
 COPY  ./Shared/  ./Shared/
 
-RUN  dotnet  publish  ./Server/Server.csproj  -c Release  -o ./out/
+ARG TARGETARCH
+
+# Download NuGet dependencies
+RUN  dotnet  restore  \
+    ./Server/Server.csproj  \
+    -r debian.11-`echo $TARGETARCH | sed 's@^amd@x@'`  \
+;
+
+# Build application binary
+RUN  dotnet  publish  \
+    ./Server/Server.csproj  \
+    -r debian.11-`echo $TARGETARCH | sed 's@^amd@x@'`  \
+    -c Release  \
+    -o ./out/  \
+    --no-restore  \
+    --self-contained  \
+    -p:publishSingleFile=true  \
+;
 
 ##################################################################   build   ###
 ################################################################################
 ################################################################   runtime   ###
 
-FROM  mcr.microsoft.com/dotnet/runtime:6.0  as  runtime
+FROM  debian:11-slim  as  runtime
 
-WORKDIR  /data/
+# Download & install additional runtime dependencies
+RUN   apt-get  update  \
+  &&  apt-get  install  -y  libicu67  \
+  &&  rm  -rf  /var/lib/apt/lists/*  \
+;
 
+# Copy application binary from build stage
 COPY  --from=build  /app/out/  /app/
 
-ENTRYPOINT  [ "dotnet", "/app/Server.dll" ]
-
-EXPOSE  1027/tcp
-VOLUME  /data/
+ENTRYPOINT  [ "/app/Server" ]
+EXPOSE      1027/tcp
+WORKDIR     /data/
+VOLUME      /data/
 
 ################################################################   runtime   ###
 ################################################################################