Add PostGIS compose service and update public integration docs.

Wire API services to PostGIS in docker-compose, broaden CORS handling for cross-origin clients, and align developer docs with the production momswap URL.

Made-with: Cursor

docker-compose.yml

@@ -1,4 +1,23 @@
 services:
+  db:
+    image: postgis/postgis:17-3.5
+    container_name: momswap-backend-db
+    environment:
+      POSTGRES_DB: "${POSTGRES_DB:-momswap}"
+      POSTGRES_USER: "${POSTGRES_USER:-momswap}"
+      POSTGRES_PASSWORD: "${POSTGRES_PASSWORD:-momswap}"
+    ports:
+      - "5432:5432"
+    volumes:
+      - ./var/posrgres:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER:-momswap} -d ${POSTGRES_DB:-momswap}"]
+      interval: 10s
+      timeout: 5s
+      retries: 10
+      start_period: 10s
+    restart: unless-stopped
+
   api:
     build:
       context: .
@@ -13,6 +32,10 @@ services:
     environment:
       ADDR: ":8080"
       ADMIN_PUBLIC_KEY: "${ADMIN_PUBLIC_KEY:-}"
+      DATABASE_URL: "postgres://${POSTGRES_USER:-momswap}:${POSTGRES_PASSWORD:-momswap}@db:5432/${POSTGRES_DB:-momswap}?sslmode=disable"
+    depends_on:
+      db:
+        condition: service_healthy
     ports:
       - "8080:8080"
     restart: unless-stopped
@@ -32,6 +55,10 @@ services:
     environment:
       ADDR: ":8080"
       ADMIN_PUBLIC_KEY: "${ADMIN_PUBLIC_KEY:-}"
+      DATABASE_URL: "postgres://${POSTGRES_USER:-momswap}:${POSTGRES_PASSWORD:-momswap}@db:5432/${POSTGRES_DB:-momswap}?sslmode=disable"
+    depends_on:
+      db:
+        condition: service_healthy
     ports:
       - "8080:8080"
     restart: unless-stopped
@@ -50,3 +77,4 @@ services:
           path: ./go.mod
         - action: rebuild
           path: ./Dockerfile
+