This works on both arm and x86 (#2337)

Co-authored-by: John Detter <no-reply@boppygames.gg>

Dockerfile

@@ -1,21 +1,49 @@
+# Use a base image that supports multi-arch
 FROM rust:bookworm
 
-RUN curl -sSfLO https://packages.microsoft.com/config/debian/12/packages-microsoft-prod.deb && \
-      dpkg -i packages-microsoft-prod.deb && \
-      rm packages-microsoft-prod.deb && \
-      apt-get update && \
-      apt-get install -y dotnet-sdk-8.0 binaryen && \
-      rm -rf /var/lib/apt/lists/* && \
-      dotnet workload install wasi-experimental
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+      curl \
+      ca-certificates \
+      binaryen \
+      build-essential \
+      && rm -rf /var/lib/apt/lists/*
 
+# Determine architecture for .NET installation
+ARG TARGETARCH
+ENV DOTNET_ARCH=${TARGETARCH}
+
+RUN if [ "$DOTNET_ARCH" = "amd64" ]; then \
+        DOTNET_ARCH="x64"; \
+    elif [ "$DOTNET_ARCH" = "arm64" ]; then \
+        DOTNET_ARCH="arm64"; \
+    else \
+        echo "Unsupported architecture: $DOTNET_ARCH" && exit 1; \
+    fi && \
+    curl -sSL https://dot.net/v1/dotnet-install.sh | bash /dev/stdin --channel 8.0 --install-dir /usr/share/dotnet --architecture $DOTNET_ARCH
+
+ENV PATH="/usr/share/dotnet:${PATH}"
+
+# Install the experimental WASI workload
+RUN dotnet workload install wasi-experimental
+
+# Install Rust WASM target
 RUN rustup target add wasm32-unknown-unknown
 
+# Create and switch to a non-root user
 RUN useradd -m spacetime
 USER spacetime
+
+# Install SpacetimeDB
 RUN curl -sSfL https://install.spacetimedb.com | bash -s -- --yes
 ENV PATH="/home/spacetime/.local/bin:${PATH}"
+
+# Set working directory
 WORKDIR /app
 
+# Expose the necessary port
 EXPOSE 3000
 
+# Define the entrypoint
 ENTRYPOINT ["spacetime"]
+