feat(devenv): Add support for dev container

.devcontainer/Dockerfile

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+# Development container for Sourcebot
+# Based on Node.js 24 with TypeScript support
+FROM mcr.microsoft.com/devcontainers/typescript-node:24
+
+ARG GO_VERSION=1.23.4
+ARG CTAGS_VERSION=v6.1.0
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    # Build tools for universal-ctags
+    autoconf \
+    automake \
+    pkg-config \
+    make \
+    gcc \
+    g++ \
+    libjansson-dev \
+    libyaml-dev \
+    libseccomp-dev \
+    libxml2-dev \
+    # PostgreSQL client tools (for debugging)
+    postgresql-client \
+    # Redis CLI tools (for debugging)
+    redis-tools \
+    # Other utilities
+    curl \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Go (detect architecture automatically)
+RUN ARCH=$(dpkg --print-architecture) && \
+    if [ "$ARCH" = "arm64" ]; then GOARCH="arm64"; else GOARCH="amd64"; fi && \
+    curl -fsSL "https://go.dev/dl/go${GO_VERSION}.linux-${GOARCH}.tar.gz" | tar -C /usr/local -xzf -
+ENV PATH="/usr/local/go/bin:${PATH}"
+ENV GOPATH="/home/node/go"
+ENV PATH="${GOPATH}/bin:${PATH}"
+
+# Build and install universal-ctags from source
+RUN git clone --depth 1 --branch "${CTAGS_VERSION}" https://github.com/universal-ctags/ctags.git /tmp/ctags \
+    && cd /tmp/ctags \
+    && ./autogen.sh \
+    && ./configure \
+    && make -j$(nproc) \
+    && make install \
+    && rm -rf /tmp/ctags
+
+# Enable corepack for Yarn and disable download prompts
+ENV COREPACK_ENABLE_DOWNLOAD_PROMPT=0
+RUN corepack enable
+
+# Create directories that will be mounted as volumes with correct ownership
+# This ensures the node user can write to them when volumes are mounted
+RUN mkdir -p /home/node/go /home/node/.yarn/berry/cache \
+    && chown -R node:node /home/node/go /home/node/.yarn
+
+# Set working directory
+WORKDIR /workspaces/sourcebot
+
+# Switch to non-root user
+USER node
+
+# Install Claude CLI (native binary)
+RUN curl -fsSL https://claude.ai/install.sh | bash
+ENV PATH="/home/node/.claude/bin:${PATH}"

.devcontainer/devcontainer.json

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+{
+  "name": "Sourcebot Development",
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "devcontainer",
+  "workspaceFolder": "/workspaces/sourcebot",
+
+  "features": {
+    "ghcr.io/devcontainers/features/git:1": {},
+    "ghcr.io/devcontainers/features/github-cli:1": {}
+  },
+
+  "forwardPorts": [3000],
+  "portsAttributes": {
+    "3000": { "label": "Web App", "onAutoForward": "notify" }
+  },
+
+  "initializeCommand": "git submodule update --init --recursive",
+  "postCreateCommand": "bash .devcontainer/scripts/post-create.sh",
+  "postStartCommand": "bash .devcontainer/scripts/post-start.sh",
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "dbaeumer.vscode-eslint",
+        "bradlc.vscode-tailwindcss",
+        "Prisma.prisma",
+        "esbenp.prettier-vscode",
+        "golang.go",
+        "ms-azuretools.vscode-docker",
+        "mikestead.dotenv",
+        "eamodio.gitlens"
+      ],
+      "settings": {
+        "editor.formatOnSave": true,
+        "editor.defaultFormatter": "esbenp.prettier-vscode",
+        "[typescript]": {
+          "editor.defaultFormatter": "esbenp.prettier-vscode"
+        },
+        "[typescriptreact]": {
+          "editor.defaultFormatter": "esbenp.prettier-vscode"
+        },
+        "[prisma]": {
+          "editor.defaultFormatter": "Prisma.prisma"
+        }
+      }
+    }
+  },
+
+  "remoteUser": "node"
+}

.devcontainer/docker-compose.yml

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+version: '3.8'
+
+services:
+  devcontainer:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    volumes:
+      - ..:/workspaces/sourcebot:cached
+      - go-modules:/home/node/go
+      - yarn-cache:/home/node/.yarn/berry/cache
+    command: sleep infinity
+    ports:
+      - "3000:3000"
+    environment:
+      DATABASE_URL: postgresql://postgres:postgres@postgres:5432/postgres
+      REDIS_URL: redis://redis:6379
+      ZOEKT_WEBSERVER_URL: http://localhost:6070
+      CTAGS_COMMAND: ctags
+      AUTH_SECRET: "00000000000000000000000000000000000000000000"
+      AUTH_URL: http://localhost:3000
+      DATA_CACHE_DIR: /workspaces/sourcebot/.sourcebot
+      SOURCEBOT_ENCRYPTION_KEY: "00000000000000000000000000000000"
+      NODE_ENV: development
+      SOURCEBOT_LOG_LEVEL: debug
+      SOURCEBOT_TELEMETRY_DISABLED: "true"
+      REVIEW_AGENT_LOGGING_ENABLED: "true"
+      REVIEW_AGENT_AUTO_REVIEW_ENABLED: "false"
+      REVIEW_AGENT_REVIEW_COMMAND: review
+    depends_on:
+      - postgres
+      - redis
+
+  postgres:
+    image: postgres:16-alpine
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_DB: postgres
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+    restart: unless-stopped
+
+  redis:
+    image: redis:7-alpine
+    volumes:
+      - redis-data:/data
+    restart: unless-stopped
+
+volumes:
+  go-modules:
+  yarn-cache:
+  postgres-data:
+  redis-data:

.devcontainer/scripts/post-create.sh

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+#!/bin/bash
+# post-create.sh - One-time setup after container creation
+set -e
+
+echo "=========================================="
+echo "Sourcebot Dev Container: Post-Create Setup"
+echo "=========================================="
+
+cd /workspaces/sourcebot
+
+# 1. Initialize git submodules (in case initializeCommand didn't run)
+echo ""
+echo "[1/2] Initializing git submodules..."
+git submodule update --init --recursive
+
+# 2. Build Zoekt and install dependencies (uses Makefile)
+echo ""
+echo "[2/2] Building Zoekt and installing dependencies..."
+make
+
+echo ""
+echo "=========================================="
+echo "Post-create setup complete!"
+echo ""
+echo "To start the development server, run:"
+echo "  yarn dev"
+echo ""
+echo "Services will be available at:"
+echo "  - Web App: http://localhost:3000"
+echo "  - Zoekt:   http://localhost:6070"
+echo "=========================================="

.devcontainer/scripts/post-start.sh

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+#!/bin/bash
+# post-start.sh - Runs each time the container starts
+set -e
+
+echo "=========================================="
+echo "Sourcebot Dev Container: Post-Start Check"
+echo "=========================================="
+
+cd /workspaces/sourcebot
+
+# 1. Wait for PostgreSQL to be ready
+echo ""
+echo "[1/2] Checking PostgreSQL connection..."
+timeout=30
+counter=0
+until pg_isready -h postgres -p 5432 -U postgres > /dev/null 2>&1; do
+  counter=$((counter + 1))
+  if [ $counter -ge $timeout ]; then
+    echo "ERROR: PostgreSQL did not become ready within ${timeout} seconds"
+    exit 1
+  fi
+  echo "  Waiting for PostgreSQL... ($counter/$timeout)"
+  sleep 1
+done
+echo "PostgreSQL is ready!"
+
+# 2. Wait for Redis to be ready
+echo ""
+echo "[2/2] Checking Redis connection..."
+counter=0
+until redis-cli -h redis -p 6379 ping > /dev/null 2>&1; do
+  counter=$((counter + 1))
+  if [ $counter -ge $timeout ]; then
+    echo "ERROR: Redis did not become ready within ${timeout} seconds"
+    exit 1
+  fi
+  echo "  Waiting for Redis... ($counter/$timeout)"
+  sleep 1
+done
+echo "Redis is ready!"
+
+echo ""
+echo "=========================================="
+echo "Dev container is ready!"
+echo ""
+echo "To start development, run:"
+echo "  yarn dev"
+echo "=========================================="