refactor: hardcode ports in docker-compose.yml for server deployment

- Remove env variable substitution from docker-compose.yml ports
- Hardcode custom ports directly in compose file: 7080, 7081, 7082, 7700, 6432
- Remove PORT variables from .env.example (now configured in docker-compose.yml)
- Add documentation on how to change ports (edit docker-compose.yml directly)
- Simplifies server deployment - no need to export env variables before docker-compose up

Note: To change ports, edit infra/docker-compose.yml directly

.env.example

@@ -3,8 +3,7 @@
 # HOW TO USE:
 # 1. Copy this file to .env: cp .env.example .env
 # 2. Change the REQUIRED values below
-# 3. Optionally change ports if you have conflicts
-# 4. Run: docker-compose up --build
+# 3. Run: docker-compose up --build
 
 # =============================================================================
 # REQUIRED - Change these values in production!
@@ -18,21 +17,7 @@ MEILI_MASTER_KEY=change-me-in-production
 API_BOOTSTRAP_TOKEN=change-me-in-production
 
 # =============================================================================
-# Port Configuration (change only if you have port conflicts)
-# Update both the PORT variable AND the URL variables below
-# =============================================================================
-
-# Main application ports
-API_PORT=8080
-INDEXER_PORT=8081
-BACKOFFICE_PORT=8082
-
-# Infrastructure ports
-MEILI_PORT=7700
-POSTGRES_PORT=5432
-
-# =============================================================================
-# Service URLs (update these when you change ports above!)
+# Service Configuration
 # =============================================================================
 
 # API Service
@@ -43,15 +28,10 @@ API_BASE_URL=http://api:8080
 INDEXER_LISTEN_ADDR=0.0.0.0:8081
 INDEXER_SCAN_INTERVAL_SECONDS=5
 
-# Backoffice Web UI
-# Uses BACKOFFICE_PORT from above
-
 # Meilisearch Search Engine
 MEILI_URL=http://meilisearch:7700
 
 # PostgreSQL Database
-# Note: Always use port 5432 here (internal Docker port)
-# Change POSTGRES_PORT above only for the external mapping
 DATABASE_URL=postgres://stripstream:stripstream@postgres:5432/stripstream
 
 # =============================================================================
@@ -67,3 +47,13 @@ LIBRARIES_ROOT_PATH=/libraries
 # Default: ../libraries (relative to infra/docker-compose.yml)
 # You can change this to an absolute path on your machine
 LIBRARIES_HOST_PATH=../libraries
+
+# =============================================================================
+# Port Configuration
+# =============================================================================
+# To change ports, edit docker-compose.yml directly:
+# - API: change "7080:8080" to "YOUR_PORT:8080"
+# - Indexer: change "7081:8081" to "YOUR_PORT:8081"
+# - Backoffice: change "7082:8082" to "YOUR_PORT:8082"
+# - Meilisearch: change "7700:7700" to "YOUR_PORT:7700"
+# - PostgreSQL: change "6432:5432" to "YOUR_PORT:5432"