Enhance devcontainer with zsh, Oh My Zsh, GitHub CLI, and improved shell experience

- Add zsh with Oh My Zsh for colorful terminal experience matching host
- Install GitHub CLI with GH_TOKEN environment variable support
- Configure persistent shell history for both bash and zsh (10k commands)
- Add volume mounts for shell history, Claude auth, and GitHub CLI auth
- Move docker-compose.yml to project root following standard conventions
- Fix workspace folder mapping for proper git repository access
- Enhanced bash/zsh configuration with history deduplication and sharing

Author: wassertim

.devcontainer/Dockerfile

@@ -1,9 +1,11 @@
 # Use official Maven image with Eclipse Temurin Java 25
 FROM maven:3.9.11-eclipse-temurin-25
 
-# Install unzip and other tools needed
+# Install unzip, zsh and other tools needed
 RUN apt-get update && apt-get install -y \
     unzip \
+    zsh \
+    git \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
@@ -16,4 +18,42 @@ RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2
     && ./aws/install \
     && rm -rf awscliv2.zip aws
 
+# Install GitHub CLI using direct binary download to avoid repository issues
+RUN ARCH=$(uname -m) && \
+    if [ "$ARCH" = "x86_64" ]; then \
+        GH_ARCH="linux_amd64"; \
+    elif [ "$ARCH" = "aarch64" ]; then \
+        GH_ARCH="linux_arm64"; \
+    else \
+        echo "Unsupported architecture: $ARCH" && exit 1; \
+    fi && \
+    GH_VERSION=$(curl -s https://api.github.com/repos/cli/cli/releases/latest | grep 'tag_name' | cut -d'"' -f4 | cut -c2-) && \
+    curl -L "https://github.com/cli/cli/releases/download/v${GH_VERSION}/gh_${GH_VERSION}_${GH_ARCH}.tar.gz" -o gh.tar.gz && \
+    tar -xzf gh.tar.gz && \
+    mv "gh_${GH_VERSION}_${GH_ARCH}/bin/gh" /usr/local/bin/gh && \
+    chmod +x /usr/local/bin/gh && \
+    rm -rf gh.tar.gz "gh_${GH_VERSION}_${GH_ARCH}"
+
+# Install Oh My Zsh and configure zsh as default shell
+RUN sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)" "" --unattended && \
+    chsh -s $(which zsh) root
+
+# Set up shell history persistence for both bash and zsh
+RUN mkdir -p /root/.shell_history && \
+    # Bash configuration
+    echo 'export HISTFILE=/root/.shell_history/.bash_history' >> /root/.bashrc && \
+    echo 'export HISTSIZE=10000' >> /root/.bashrc && \
+    echo 'export HISTFILESIZE=10000' >> /root/.bashrc && \
+    echo 'export HISTCONTROL=ignoredups:erasedups' >> /root/.bashrc && \
+    echo 'shopt -s histappend' >> /root/.bashrc && \
+    echo 'export PROMPT_COMMAND="history -a; history -c; history -r"' >> /root/.bashrc && \
+    # Zsh configuration
+    echo 'export HISTFILE=/root/.shell_history/.zsh_history' >> /root/.zshrc && \
+    echo 'export HISTSIZE=10000' >> /root/.zshrc && \
+    echo 'export SAVEHIST=10000' >> /root/.zshrc && \
+    echo 'setopt HIST_IGNORE_DUPS' >> /root/.zshrc && \
+    echo 'setopt HIST_IGNORE_ALL_DUPS' >> /root/.zshrc && \
+    echo 'setopt HIST_SAVE_NO_DUPS' >> /root/.zshrc && \
+    echo 'setopt SHARE_HISTORY' >> /root/.zshrc
+
 # Maven images typically run as root by default, which is fine for devcontainers

.devcontainer/devcontainer.json

@@ -1,8 +1,11 @@
 {
   "name": "DynamoDB Toolkit Dev Environment",
-  "dockerComposeFile": "docker-compose.yml",
+  "dockerComposeFile": "../docker-compose.yml",
   "service": "devcontainer",
   "workspaceFolder": "/workspace",
+  "containerEnv": {
+    "GH_TOKEN": "${localEnv:GH_TOKEN}"
+  },
   "customizations": {
     "vscode": {
       "extensions": [

.devcontainer/docker-compose.yml

@@ -1,12 +1,32 @@
 version: '3.8'
 
 services:
+  devcontainer:
+    build:
+      context: .devcontainer
+      dockerfile: Dockerfile
+    volumes:
+      - .:/workspace:cached
+      - devcontainer-shell-history:/root/.shell_history
+      - claude-auth:/root/.config/claude
+      - github-cli-auth:/root/.config/gh
+    working_dir: /workspace
+    command: sleep infinity
+    depends_on:
+      - dynamodb-local
+    environment:
+      AWS_ACCESS_KEY_ID: dummy
+      AWS_SECRET_ACCESS_KEY: dummy
+      AWS_DEFAULT_REGION: us-east-1
+      DYNAMODB_ENDPOINT: http://dynamodb-local:8000
+
   dynamodb-local:
     image: amazon/dynamodb-local:latest
     command: ["-jar", "DynamoDBLocal.jar", "-sharedDb", "-inMemory"]
     ports:
-      - "8000:8000"
-    environment:
-      - AWS_ACCESS_KEY_ID=dummy
-      - AWS_SECRET_ACCESS_KEY=dummy
-      - AWS_DEFAULT_REGION=us-east-1
+      - "8083:8000"
+
+volumes:
+  devcontainer-shell-history:
+  claude-auth:
+  github-cli-auth: