initialize backlog

.devcontainer/Dockerfile.devcontainer

@@ -1,4 +1,4 @@
-FROM ruby:3.2.0 AS native-gems
+FROM ruby:3.2 AS native-gems
 RUN rm -f /etc/apt/apt.conf.d/docker-clean; \
     echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
 RUN \
@@ -101,3 +101,6 @@ RUN curl --proto '=https' --tlsv1.2 -sSf https://just.systems/install.sh | bash
 
 RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && nvm install 18 && nvm use 18 && npm install -g yarn" 2>&1
 ENV PATH /usr/local/share/nvm/current/bin:$PATH
+
+# install `backlog` tool
+RUN su vscode -c "npm i -g backlog.md"

.devcontainer/fish-shell-conf-d/rustup.fish

@@ -1 +0,0 @@
-source "$HOME/.cargo/env.fish"