chore: enable host to specify docker group id

Author: tstephen-nhs

.devcontainer/Dockerfile

@@ -1,14 +1,30 @@
 FROM mcr.microsoft.com/devcontainers/base:ubuntu
 
-ARG TARGETARCH
-ENV TARGETARCH=${TARGETARCH}
+# provide DOCKER_GID via build args if you need to force group id to match host
+ARG DOCKER_GID
+
+# specify DOCKER_GID to force container docker group id to match host
+RUN if [ -n "${DOCKER_GID}" ]; then \
+      if ! getent group docker; then \
+        groupadd -g ${DOCKER_GID} docker; \
+      else \
+        groupmod -g ${DOCKER_GID} docker; \
+      fi && \
+      usermod -aG docker vscode; \
+    fi
 
 ARG ASDF_VERSION
 COPY .tool-versions.asdf /tmp/.tool-versions.asdf
 
+ARG TARGETARCH
+ENV TARGETARCH=${TARGETARCH}
+
 # Add amd64 architecture if on arm64
 RUN if [ "$TARGETARCH" = "arm64" ] || [ "$TARGETARCH" = "aarch64" ]; then dpkg --add-architecture amd64; fi
 
+# Anticipate and resolve potential permission issues with apt
+RUN mkdir -p /tmp && chmod 1777 /tmp
+
 RUN apt-get update \
     && export DEBIAN_FRONTEND=noninteractive \
     && apt-get -y dist-upgrade \
@@ -51,7 +67,6 @@ RUN ASDF_VERSION=$(awk '!/^#/ && NF {print $1; exit}' /tmp/.tool-versions.asdf)
     tar -xvzf /tmp/asdf.tar.gz && \
     mv asdf /usr/bin
 
-
 USER vscode
 
 ENV PATH="/home/vscode/.asdf/shims/:$PATH"

.devcontainer/devcontainer.json

@@ -6,7 +6,9 @@
     "build": {
       "dockerfile": "Dockerfile",
       "context": "..",
-      "args": {}
+      "args": {
+        "DOCKER_GID": "${env:DOCKER_GID:}"
+      }
     },
     "mounts": [
       "source=${env:HOME}${env:USERPROFILE}/.aws,target=/home/vscode/.aws,type=bind",