Fix port conflict: move dev port mappings to docker-compose.dev.yml

Base compose file had postgres:5433 and qdrant:6333 exposed, which
caused port conflicts on the server. compose override with ports:[]
doesn't clear parent lists — it appends. Moved external port mappings
to docker-compose.dev.yml for local dev only.

Local dev: docker compose -f docker-compose.yml -f docker-compose.dev.yml up -d
Prod:      docker compose -f docker-compose.yml -f docker-compose.prod.yml up -d

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: pavelzeman

docker-compose.dev.yml

@@ -0,0 +1,9 @@
+services:
+  postgres:
+    ports:
+      - "5433:5432"
+
+  qdrant:
+    ports:
+      - "6333:6333"
+      - "6334:6334"

docker-compose.prod.yml

@@ -1,11 +1,9 @@
 services:
   postgres:
     restart: unless-stopped
-    ports: []  # not exposed publicly in prod
 
   qdrant:
     restart: unless-stopped
-    ports: []  # served via nginx in prod
 
   streamlit:
     build: .

docker-compose.yml

@@ -5,8 +5,6 @@ services:
       POSTGRES_DB: mm_forum
       POSTGRES_USER: mm
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-changeme}
-    ports:
-      - "5433:5432"
     volumes:
       - postgres_data:/var/lib/postgresql/data
     healthcheck:
@@ -17,9 +15,6 @@ services:
 
   qdrant:
     image: qdrant/qdrant:latest
-    ports:
-      - "6333:6333"
-      - "6334:6334"
     volumes:
       - qdrant_storage:/qdrant/storage
     healthcheck: