feat: Improve docker-compose.yml

- Remove host port mappings on dependencies
- Add 'restart: always'
- Add default network for lookup by docker dns

docker-compose.yml

@@ -1,12 +1,13 @@
 services:
   database:
     image: ankane/pgvector
-    ports:
-      - "5432:5432"
+    restart: always
     environment:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: postgres
       POSTGRES_DB: postgres
+    networks:
+      - default
     volumes:
       - khoj_db:/var/lib/postgresql/data/
     healthcheck:
@@ -16,22 +17,25 @@ services:
       retries: 5
   sandbox:
     image: ghcr.io/khoj-ai/terrarium:latest
-    ports:
-      - "8080:8080"
+    restart: always
+    networks:
+      - default
   search:
     image: docker.io/searxng/searxng:latest
-    ports:
-      - "42113:8080"
+    restart: always
+    networks:
+      - default
     volumes:
       - khoj_search:/etc/searxng
     environment:
-      - SEARXNG_BASE_URL=http://localhost:42113/
+      - SEARXNG_BASE_URL=http://0.0.0.0:8080/
   server:
     depends_on:
       database:
         condition: service_healthy
     # Use the following line to use the latest version of khoj. Otherwise, it will build from source. Set this to ghcr.io/khoj-ai/khoj-cloud:latest if you want to use the prod image.
     image: ghcr.io/khoj-ai/khoj:latest
+    restart: always
     # Uncomment the following line to build from source. This will take a few minutes. Comment the next two lines out if you want to use the official image.
     # build:
       # context: .
@@ -42,6 +46,10 @@ services:
       #   as well as the port in the command section to match
       - "42110:42110"
     working_dir: /app
+    networks:
+      - default
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
     volumes:
       - khoj_config:/root/.khoj/
       - khoj_models:/root/.cache/torch/sentence_transformers
@@ -58,9 +66,9 @@ services:
       - KHOJ_ADMIN_EMAIL=username@example.com
       - KHOJ_ADMIN_PASSWORD=password
       # Default URL of Terrarium, the Python sandbox used by Khoj to run code. Its container is specified above
-      - KHOJ_TERRARIUM_URL=http://host.docker.internal:8080
+      - KHOJ_TERRARIUM_URL=http://sandbox:8080
       # Default URL of SearxNG, the default web search engine used by Khoj. Its container is specified above
-      - KHOJ_SEARXNG_URL=http://host.docker.internal:42113
+      - KHOJ_SEARXNG_URL=http://search:8080
       # Uncomment line below to use with Ollama running on your local machine at localhost:11434.
       # Change URL to use with other OpenAI API compatible providers like VLLM, LMStudio etc.
       # - OPENAI_API_BASE=http://host.docker.internal:11434/v1/
@@ -98,7 +106,6 @@ services:
     # Comment out this line when you're using the official ghcr.io/khoj-ai/khoj-cloud:latest prod image.
     command: --host="0.0.0.0" --port=42110 -vv --anonymous-mode --non-interactive
 
-
 volumes:
   khoj_config:
   khoj_db: