chore: multi-platform support for asdf

Author: tstephen-nhs

.devcontainer/Dockerfile

@@ -44,9 +44,16 @@ RUN if [ "$TARGETARCH" = "arm64" ] || [ "$TARGETARCH" = "aarch64" ]; then \
 
 # Install ASDF
 RUN ASDF_VERSION=$(awk '!/^#/ && NF {print $1; exit}' /tmp/.tool-versions.asdf) && \
-    wget -O /tmp/asdf.tar.gz https://github.com/asdf-vm/asdf/releases/download/v${ASDF_VERSION}/asdf-v${ASDF_VERSION}-linux-amd64.tar.gz; \
-    tar -xvzf /tmp/asdf.tar.gz; \
-    mv asdf /usr/bin
+    if [ "$TARGETARCH" = "arm64" ] || [ "$TARGETARCH" == "aarch64" ]; then \
+      wget -O /tmp/asdf.tar.gz "https://github.com/asdf-vm/asdf/releases/download/v${ASDF_VERSION}/asdf-v${ASDF_VERSION}-linux-arm64.tar.gz"; \
+    else \
+      wget -O /tmp/asdf.tar.gz "https://github.com/asdf-vm/asdf/releases/download/v${ASDF_VERSION}/asdf-v${ASDF_VERSION}-linux-amd64.tar.gz"; \
+    fi && \
+    tar -xzf /tmp/asdf.tar.gz -C /tmp && \
+    mkdir -p /usr/bin && \
+    mv /tmp/asdf /usr/bin/asdf && \
+    chmod +x /usr/bin/asdf && \
+    rm -rf /tmp/asdf.tar.gz 
 
 # specify DOCKER_GID to force container docker group id to match host
 RUN if [ -n "${DOCKER_GID}" ]; then \