add database schema and update docker-compose for initialization

db/sql/01_schema.sql

@@ -0,0 +1,15 @@
+CREATE SCHEMA IF NOT EXISTS ethnograph;
+
+CREATE TABLE IF NOT EXISTS ethnograph.users (
+    id SERIAL PRIMARY KEY,
+    username VARCHAR(255) UNIQUE NOT NULL,
+    created_utc TIMESTAMP NOT NULL,
+    karma INTEGER
+);
+
+CREATE TABLE IF NOT EXISTS ethnograph.posts (
+    id SERIAL PRIMARY KEY,
+    user_id INTEGER REFERENCES ethnograph.users(id),
+    content TEXT NOT NULL,
+    created_utc TIMESTAMP NOT NULL
+);

docker-compose.yml

@@ -1,7 +1,7 @@
 services:
   postgres:
     image: postgres:16
-    container_name: ethnograph-postgres
+    container_name: ethnograph-db
     restart: unless-stopped
     environment:
       POSTGRES_DB: ethnograph
@@ -11,6 +11,7 @@ services:
       - "5432:5432"
     volumes:
       - pgdata:/var/lib/postgresql/data
+      - ./db/sql:/docker-entrypoint-initdb.d
 
 volumes:
   pgdata: