Initial commit

.devcontainer/devcontainer.json

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+{
+    "name": "OctoFit Tracker Multi-tier Application Codespace",
+    "image": "mcr.microsoft.com/devcontainers/base:jammy",
+    "features": {
+        "ghcr.io/devcontainers/features/docker-in-docker:2": {},
+        "ghcr.io/devcontainers/features/github-cli:1": {},
+        "ghcr.io/devcontainers/features/node:1": {
+            "version": "lts",
+            "pnpmVersion": "latest",
+            "nvmVersion": "latest"
+        }
+    },
+    "postCreateCommand": "sudo chmod +x ./.devcontainer/post_create.sh && ./.devcontainer/post_create.sh",
+    "postStartCommand": "sudo chmod +x ./.devcontainer/post_start.sh && ./.devcontainer/post_start.sh",
+    "customizations": {
+        "vscode": {
+            "extensions": [
+                "github.copilot",
+                "markdown-lint.markdownlinter",
+                "ms-vscode.vscode-typescript-next",
+                "dbaeumer.vscode-eslint"
+            ],
+            "settings": {
+                "chat.agent.enabled": true
+            }
+        }
+    },
+    "forwardPorts": [
+        5173,
+        8000,
+        27017
+    ],
+    "portsAttributes": {
+        "5173": {
+            "label": "octofit-tracker-frontend",
+            "requireLocalPort": true
+        },
+        "8000": {
+            "label": "octofit-tracker-api",
+            "requireLocalPort": true
+        },
+        "27017": {
+            "label": "octofit-tracker-mongodb",
+            "requireLocalPort": true
+        }
+    }
+}

.devcontainer/post_create.sh

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+#!/bin/bash
+# This script is run after the container is created.
+
+set -euo pipefail
+
+wget -qO - https://pgp.mongodb.com/server-6.0.asc | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/mongodb-server-6.0.gpg > /dev/null
+echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/6.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-6.0.list
+sudo apt-get update
+sudo apt-get install -y mongodb-org
+sudo mkdir -p /usr/local/etc/vscode-dev-containers
+sudo cp --force ./.devcontainer/welcome-message.txt /usr/local/etc/vscode-dev-containers/first-run-notice.txt

.devcontainer/post_start.sh

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+#!/bin/bash
+# This script is run after the container starts up.
+
+set -euo pipefail
+
+die() {
+  echo "ERROR: $@" >&2
+  exit 1
+}
+
+: "${CODESPACE_NAME:?CODESPACE_NAME environment variable not set. This script should be run in a GitHub Codespace environment.}"
+
+echo "Setting multi-tier application port visibility..."
+gh cs ports visibility 8000:public -c "$CODESPACE_NAME" || die "Failed to set 8000 public"
+gh cs ports visibility 5173:public -c "$CODESPACE_NAME" || die "Failed to set 5173 public"
+gh cs ports visibility 27017:private -c "$CODESPACE_NAME" || die "Failed to set 27017 private"
+
+echo "Preparing MongoDB data dir..."
+sudo mkdir -p /data/db || die "mkdir failed"
+sudo chmod 777 /data/db || die "chmod failed"
+
+LOGFILE=/tmp/mongod.log
+MAX_START_TRIES=3
+READY_CHECK_RETRIES=15
+READY_CHECK_INTERVAL=1
+
+is_running() {
+  ps aux | grep '[m]ongod' >/dev/null 2>&1
+}
+
+mongod_pid() {
+  pgrep -x mongod || true
+}
+
+start_mongod() {
+  if is_running; then
+    echo "mongod already running"
+    return 0
+  fi
+  > "$LOGFILE"
+  echo "Launching mongod (dbpath=/data/db, log=$LOGFILE)..."
+  mongod --dbpath /data/db --fork --logpath "$LOGFILE"
+}
+
+ready_check() {
+  if grep -q "Waiting for connections" "$LOGFILE" 2>/dev/null; then
+    return 0
+  fi
+  if command -v nc >/dev/null 2>&1; then
+    nc -z 127.0.0.1 27017 2>/dev/null && return 0
+  fi
+  if command -v mongosh >/dev/null 2>&1; then
+    mongosh --quiet --eval 'db.runCommand({ping:1})' >/dev/null 2>&1 && return 0 || true
+  fi
+  return 1
+}
+
+wait_for_ready() {
+  for ((i=1; i<=READY_CHECK_RETRIES; i++)); do
+    if ready_check; then
+      echo "mongod is ready (after $i checks)."
+      return 0
+    fi
+    sleep "$READY_CHECK_INTERVAL"
+  done
+  return 1
+}
+
+echo "Starting MongoDB with retries..."
+for ((attempt=1; attempt<=MAX_START_TRIES; attempt++)); do
+  echo "Start attempt $attempt/$MAX_START_TRIES"
+  if start_mongod && wait_for_ready; then
+    tail -20 "$LOGFILE" || true
+    echo "MongoDB started successfully."
+    break
+  fi
+
+  if (( attempt == MAX_START_TRIES )); then
+    tail -40 "$LOGFILE" || true
+    die "MongoDB failed to start after $MAX_START_TRIES attempts"
+  fi
+
+  echo "Cleaning up before next attempt..."
+  cleaned_up=false
+  while IFS= read -r pid; do
+    if [ -n "$pid" ]; then
+      kill "$pid" || true
+      cleaned_up=true
+    fi
+  done < <(mongod_pid)
+  if [ "$cleaned_up" = true ]; then
+    sleep 2
+  fi
+done
+
+echo "post_start.sh completed successfully."
+exit 0

.devcontainer/welcome-message.txt

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+👋 Welcome to building a modern multi-tier application with GitHub Copilot agent mode!
+
+You will build OctoFit Tracker using:
+- Presentation tier: React 19
+- Logic tier: Node.js + Express + TypeScript
+- Data tier: MongoDB
+
+Ports used in this exercise:
+- 5173 (public)
+- 8000 (public)
+- 27017 (private)
+
+📃 GitHub Copilot documentation: https://docs.github.com/en/copilot