add devcontainer setup

Author: lebalz

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/typescript-node:1-22-bookworm
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# [Optional] Uncomment if you want to install an additional version of node using nvm
+# ARG EXTRA_NODE_VERSION=10
+# RUN su node -c "source /usr/local/share/nvm/nvm.sh && nvm install ${EXTRA_NODE_VERSION}"
+
+# [Optional] Uncomment if you want to install more global node modules
+# RUN su node -c "npm install -g <your-package-list-here>"

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/javascript-node-postgres
+{
+	"name": "Teaching-API",
+	"dockerComposeFile": "docker-compose.yml",
+	"service": "app",
+	"workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}",
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	"features": {
+		"ghcr.io/devcontainers/features/github-cli:1": {},
+		"ghcr.io/rails/devcontainer/features/postgres-client": {
+			"version": "17"
+		},
+		"ghcr.io/code-fabrik/features/dokku-cli:latest": {}
+	},
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// This can be used to network with other containers or with the host.
+	"forwardPorts": [3002, 5432],
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "yarn install",
+	// Configure tool-specific properties.
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"Prisma.prisma",
+				"mhutchie.git-graph",
+				"dbaeumer.vscode-eslint",
+				"motivesoft.vscode-uuid-generator",
+		        "dbaeumer.vscode-eslint",
+				"esbenp.prettier-vscode"
+			]
+		}
+	},
+	"remoteEnv": {
+		"DATABASE_URL": "postgresql://postgres:postgres@db:5432/teaching_api?schema=public"
+	}
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.devcontainer/docker-compose.yml

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+version: '3.8'
+
+services:
+  app:
+    build: 
+      context: ..
+      dockerfile: .devcontainer/Dockerfile
+
+    volumes:
+      - ../..:/workspaces:cached
+      
+    # Overrides default command so things don't shut down after the process ends.
+    command: sleep infinity
+
+    environment:
+      - NODE_ENV=development
+      - DATABASE_URL=postgresql://postgres:postgres@db:5432/teaching_api?schema=public
+      - PORT=3002
+
+    # Runs app on the same network as the database container, allows "forwardPorts" in devcontainer.json function.
+    network_mode: service:db
+
+    depends_on:
+      - db
+
+    # Use "forwardPorts" in **devcontainer.json** to forward an app port locally. 
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+  db:
+    image: postgres:17.2
+    restart: unless-stopped
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_USER: postgres
+      POSTGRES_DB: teaching_api
+    ports:
+      - "3002:3002"
+      - "5432:5432"
+
+    # Add "forwardPorts": ["5432"] to **devcontainer.json** to forward PostgreSQL locally.
+    # (Adding the "ports" property to this file will not forward from a Codespace.)
+
+volumes:
+  postgres-data: