Add docker compose yaml

.gitignore

@@ -25,6 +25,9 @@ rust-toolchain
 # Config files
 **/*.yaml
 
+# Allow docker-compose.yaml
+!docker-compose.yaml
+
 # Data
 **/*.csv
 **/*.jpg
@@ -37,6 +40,3 @@ rust-toolchain
 
 # VS Code
 **/.vscode
-
-# Docker
-docker-compose.yaml

README.md

@@ -445,23 +445,25 @@ Sendgrid | equals monthly limit
 
 ## Testing
 
-Some integration tests require a locally running database, and an AWS SES account.
-Specify the following environment variables:
-
-- SMTP
-  - `SMTP_SERVER`
-  - `SMTP_USERNAME`
-  - `SMTP_PASSWORD`
-- AWS SES
-  - `AWS_ACCESS_KEY_ID`
-  - `AWS_SECRET_ACCESS_KEY`
-  - `AWS_REGION`
-- Postgres
-  - `DB_HOST`
-  - `DB_PORT`
-  - `DB_USER`
-  - `DB_PASSWORD`
-  - `DB_NAME`
+Some integration tests require a locally running database, and an AWS SES
+account:
+
+1. Specify the following environment variables:
+   - SMTP
+     - `SMTP_SERVER`
+     - `SMTP_USERNAME`
+     - `SMTP_PASSWORD`
+   - AWS SES
+     - `AWS_ACCESS_KEY_ID`
+     - `AWS_SECRET_ACCESS_KEY`
+     - `AWS_REGION`
+   - Postgres
+     - `DB_HOST`
+     - `DB_PORT`
+     - `DB_USER`
+     - `DB_PASSWORD`
+     - `DB_NAME`
+2. Set up a temporary postgres db: `docker-compose run --rm --service-ports postgres`
 
 ``` bash
 # Run unit tests and integration tests

docker-compose.yaml

@@ -0,0 +1,15 @@
+version: '3'
+services:
+  postgres:
+    env_file:
+      - .env
+    volumes:
+      - ./test_data:/docker-entrypoint-initdb.d
+    image: postgres:16-alpine
+    restart: "no"
+    ports:
+      - "${DB_PORT}:5432"
+    environment:
+      POSTGRES_USER: "${DB_USER}"
+      POSTGRES_PASSWORD: "${DB_PASSWORD}"
+      POSTGRES_DB: "${DB_NAME}"