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

README.md

@@ -20,7 +20,9 @@ go test ./...
 go run ./cmd/api
 ```
 
-Server default: `http://localhost:8080`.
+Primary deployed base URL: `https://momswap.produktor.duckdns.org/`.
+
+Local default (for development): `http://localhost:8080`.
 
 Optional environment variables:
 
@@ -35,6 +37,11 @@ Build and run the backend service:
 COMPOSE_BAKE=true docker compose up --build -d
 ```
 
+This starts:
+
+- `db` (`postgis/postgis`) on `5432`
+- `api` on `8080`, wired with `DATABASE_URL` to the `db` service
+
 Stop the service:
 
 ```bash
@@ -52,6 +59,7 @@ Notes:
 - `api` service uses the production `runtime` image target.
 - `api-dev` profile uses the `dev` image target and Docker Compose watch.
 - Build cache is persisted at `.docker/buildx-cache` via `cache_from`/`cache_to`.
+- DB defaults can be overridden via `POSTGRES_DB`, `POSTGRES_USER`, `POSTGRES_PASSWORD`.
 
 ## Frontend
 
@@ -63,7 +71,10 @@ Example:
 go run ./cmd/api
 ```
 
-Then visit `http://localhost:8080/web/`.
+Then visit:
+
+- Production: `https://momswap.produktor.duckdns.org/web/`
+- Local: `http://localhost:8080/web/`
 
 ## API client library
 

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
+

docs/typescript-frontend-integration.md

@@ -2,6 +2,10 @@
 
 This document explains how frontend developers should integrate with the backend through the reusable TypeScript client at `libs/geo-api-client`.
 
+Primary backend URL for integration:
+
+- `https://momswap.produktor.duckdns.org/`
+
 ## Goals
 
 - Keep cryptographic signing logic in one place.
@@ -68,7 +72,7 @@ const storageLike = {
   removeItem: (key: string) => storage.removeItem(key),
 };
 
-const client = new GeoApiClient("http://localhost:8080", storageLike);
+const client = new GeoApiClient("https://momswap.produktor.duckdns.org", storageLike);
 
 const keys = await client.ensureKeysInStorage();
 await client.loginWithSignature(keys.publicKey, keys.privateKey);
@@ -97,3 +101,5 @@ For no-bundler apps, import the built ESM file:
 ```
 
 The backend itself serves static UI at `/web/`, but this library can be consumed by any frontend runtime that supports `fetch`, `TextEncoder`, and ES modules.
+
+For local development you can switch the client base URL to `http://localhost:8080`.

internal/http/handlers.go

@@ -45,8 +45,15 @@ func (a *API) Routes() http.Handler {
 func withCORS(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Access-Control-Allow-Origin", "*")
-		w.Header().Set("Access-Control-Allow-Headers", "Authorization, Content-Type")
-		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PATCH, DELETE, OPTIONS")
+		w.Header().Set("Vary", "Origin, Access-Control-Request-Method, Access-Control-Request-Headers")
+		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE, OPTIONS, HEAD")
+		w.Header().Set("Access-Control-Max-Age", "86400")
+		requestHeaders := r.Header.Get("Access-Control-Request-Headers")
+		if requestHeaders != "" {
+			w.Header().Set("Access-Control-Allow-Headers", requestHeaders)
+		} else {
+			w.Header().Set("Access-Control-Allow-Headers", "Authorization, Content-Type, Accept, Origin, X-Requested-With")
+		}
 		if r.Method == http.MethodOptions {
 			w.WriteHeader(http.StatusNoContent)
 			return