Update lambda stack

.env.example

@@ -0,0 +1,4 @@
+# Copy this file to .env and fill in the values.
+# .env is gitignored — never commit real secrets.
+
+FORM_SHARED_SECRET=

.gitignore

@@ -3,88 +3,39 @@ __pycache__/
 *.py[cod]
 *$py.class
 
-# C extensions
-*.so
-
 # Distribution / packaging
-.Python
-env/
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
 *.egg-info/
-.installed.cfg
 *.egg
+dist/
+build/
 
-# PyInstaller
-#  Usually these files are written by a python script from a template
-#  before PyInstaller builds the exe, so as to inject date/other infos into it.
-*.manifest
-*.spec
-
-# Installer logs
-pip-log.txt
-pip-delete-this-directory.txt
-
-# Unit test / coverage reports
-htmlcov/
-.tox/
-.coverage
-.coverage.*
-.cache
-nosetests.xml
-coverage.xml
-*,cover
-.hypothesis/
-
-# Translations
-*.mo
-*.pot
-
-# Django stuff:
-*.log
-local_settings.py
-
-# Flask stuff:
-instance/
-.webassets-cache
-
-# Scrapy stuff:
-.scrapy
-
-# Sphinx documentation
-docs/_build/
-
-# PyBuilder
-target/
-
-# Jupyter Notebook
-.ipynb_checkpoints
-
-# pyenv
-.python-version
+# Virtual environments
+.venv/
+venv/
+ENV/
 
-# celery beat schedule file
-celerybeat-schedule
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
 
 # dotenv
 .env
 
-# virtualenv
-.venv/
-venv/
-ENV/
+# pytest
+.pytest_cache/
+.coverage
+htmlcov/
+
+# mypy
+.mypy_cache/
+
+# ruff
+.ruff_cache/
 
-# Spyder project settings
-.spyderproject
+# AWS SAM
+.aws-sam/
 
-# Rope project settings
-.ropeproject
+# OS files
+.DS_Store

Makefile

@@ -0,0 +1,29 @@
+-include .env
+export
+
+DEV_OVERRIDES  = Stage=dev FromEmail=hello@tryolabs.com DestinationEmail=german@tryolabs.com FormSharedSecret=$(FORM_SHARED_SECRET)
+PROD_OVERRIDES = Stage=prod FromEmail=hello@tryolabs.com DestinationEmail=hello@tryolabs.com FormSharedSecret=$(FORM_SHARED_SECRET)
+
+.PHONY: build deploy-dev deploy-prod logs-dev logs-prod test lint
+
+build:
+	sam build --use-container
+
+deploy-dev: build
+	sam deploy --config-env dev --parameter-overrides "$(DEV_OVERRIDES)"
+
+deploy-prod: build
+	sam deploy --config-env prod --parameter-overrides "$(PROD_OVERRIDES)"
+
+logs-dev:
+	sam logs --stack-name lambda-mailer-v2-dev --region us-west-2 --tail
+
+logs-prod:
+	sam logs --stack-name lambda-mailer-v2-prod --region us-west-2 --tail
+
+test:
+	uv run pytest
+
+lint:
+	uv run ruff check .
+	uv run ruff format --check .

README.md

@@ -1,52 +1,116 @@
-# Tryolabs Lambda mailer
+# Tryolabs Lambda Mailer
 
-Uses [Zappa](https://github.com/Miserlou/Zappa) to deploy a serverless endpoint that receives a JSON and sends an email to a destination address. Made to support contact forms in our static website.
+Serverless contact form endpoint deployed to AWS Lambda via [AWS SAM](https://aws.amazon.com/serverless/sam/). Receives a JSON payload and sends an email using Amazon SES.
+
+Built with [FastAPI](https://fastapi.tiangolo.com/) + [Mangum](https://mangum.fastapiexpert.com/) (ASGI→Lambda adapter).
+
+## Prerequisites
+
+- [uv](https://docs.astral.sh/uv/) (Python package manager)
+- [AWS SAM CLI](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/install-sam-cli.html)
+- [Docker](https://www.docker.com/) (required for `sam build --use-container`)
+- Valid AWS credentials configured (`~/.aws/credentials` or environment variables)
+- A verified SES sender email address in your AWS account
 
 ## Setup
 
-_Before you begin, make sure you have a valid AWS account and your [AWS credentials file](https://blogs.aws.amazon.com/security/post/Tx3D6U6WSFGOK2H/A-New-and-Standardized-Way-to-Manage-Credentials-in-the-AWS-SDKs) is properly installed._
+**1. Install dependencies:**
+
+```bash
+uv sync --all-extras
+```
+
+**2. Configure secrets:**
+
+```bash
+cp .env.example .env
+# Edit .env and fill in FORM_SHARED_SECRET with a strong random value:
+openssl rand -hex 32
+```
+
+`.env` is gitignored — never commit it.
+
+## Deployment
+
+All deploy commands are in the `Makefile` and read secrets from `.env` automatically.
+
+Deploy to **dev**:
+
+```bash
+make deploy-dev
+```
 
-Make sure you are in a virtualenv, and run:
+Deploy to **production**:
 
+```bash
+make deploy-prod
 ```
-$ pip install -r requirements.txt
-$ zappa deploy dev
+
+### Environment variables / parameters
+
+| Parameter | Source | Description |
+|---|---|---|
+| `FromEmail` | `samconfig.toml` | Verified SES sender address |
+| `DestinationEmail` | `samconfig.toml` | Address to receive form submissions |
+| `FormSharedSecret` | `.env` | Shared secret — Next.js sends this in `X-Form-Secret` header; requests without it are rejected with 403 |
+
+Other deploy config (stack name, region) is in `samconfig.toml`.
+
+## Development
+
+Run the API locally (requires SAM CLI):
+
+```bash
+sam local start-api --env-vars env.json
 ```
 
-To redeploy:
+Or directly with uvicorn:
+
+```bash
+uv run uvicorn api:app --reload
+```
 
-    $ zappa update dev
+### Linting & formatting
 
-To deploy the production version:
+```bash
+make lint
+# or individually:
+uv run ruff check .
+uv run ruff format .
+```
 
-    $ zappa deploy prod
+### Type checking
 
+```bash
+uv run mypy api.py handler.py
+```
 
-### Environment variables
-In the `zappa_settings.json` file, you can edit the environment variables for `dev` and `prod`:
+### Testing
 
-```javascript
-{
-    "dev": {
-        ...
-        "environment_variables": {
-            "FROM_EMAIL": "alan@tryolabs.com",
-            "DESTINATION_EMAIL": "alan@tryolabs.com"
-        }
-    },
-    ...
-}
+```bash
+make test
+# or:
+uv run pytest
 ```
 
-## Testing
+### Logs
 
-With [httpie](https://httpie.org/), invoke the endpoint0 with the `message.json` test file as payload:
+```bash
+make logs-dev   # tail dev Lambda logs
+make logs-prod  # tail prod Lambda logs
+```
 
-    $ http <endpoint> < message.json
+## Manual testing
 
+With [httpie](https://httpie.org/), invoke the endpoint with the `message.json` test file:
+
+```bash
+http POST <endpoint-url> X-Form-Secret:<secret> < message.json
+```
 
 ## License
 
 Copyright (c) 2016 [Tryolabs](https://tryolabs.com).
 
 Released under the MIT License (See LICENSE).
+