Improve cargo workspace layout (#17)

Author: ekkolon

Cargo.toml

@@ -1,6 +1,6 @@
 [workspace]
 resolver = "3"
-members = ["minikv", "minikv-core"]
+members = ["crates/minikv", "crates/minikv-core"]
 
 [workspace.package]
 version = "0.1.0"
@@ -14,7 +14,7 @@ keywords = ["storage", "distributed", "leveldb", "object-store"]
 categories = ["database", "network-programming"]
 
 [workspace.dependencies]
-minikv-core = { path = "minikv-core" }
+minikv-core = { path = "crates/minikv-core" }
 
 thiserror = "2"
 tracing = "0.1"

docker-compose.yml compose.ymldocker-compose.yml renamed to compose.yml

@@ -16,7 +16,7 @@ services:
     ports:
       - "8080:8080"
     volumes:
-      - ./config/nginx-frontend.conf:/etc/nginx/nginx.conf:ro
+      - ./nginx/nginx-frontend.conf:/etc/nginx/nginx.conf:ro
     depends_on:
       minikv:
         condition: service_started
@@ -33,7 +33,7 @@ services:
   minikv:
     build:
       context: .
-      dockerfile: Dockerfile
+      dockerfile: docker/Dockerfile
       target: runtime
     image: minikv:local
     container_name: minikv
@@ -78,13 +78,13 @@ services:
   volume1:
     build:
       context: .
-      dockerfile: Dockerfile.volume
+      dockerfile: docker/Dockerfile.volume
     image: minikv-volume:local
     container_name: volume1
     ports:
       - "8001:8080" # localhost:8001 → volume1:8080 (matches --public-volumes[0])
     volumes:
-      - ./config/nginx-volume.conf:/etc/nginx/nginx.conf:ro
+      - ./nginx/nginx-volume.conf:/etc/nginx/nginx.conf:ro
       - volume1-data:/data
     networks:
       - minikv-net
@@ -102,13 +102,13 @@ services:
   volume2:
     build:
       context: .
-      dockerfile: Dockerfile.volume
+      dockerfile: docker/Dockerfile.volume
     image: minikv-volume:local
     container_name: volume2
     ports:
       - "8002:8080" # localhost:8002 → volume2:8080 (matches --public-volumes[1])
     volumes:
-      - ./config/nginx-volume.conf:/etc/nginx/nginx.conf:ro
+      - ./nginx/nginx-volume.conf:/etc/nginx/nginx.conf:ro
       - volume2-data:/data
     networks:
       - minikv-net
@@ -122,13 +122,13 @@ services:
   volume3:
     build:
       context: .
-      dockerfile: Dockerfile.volume
+      dockerfile: docker/Dockerfile.volume
     image: minikv-volume:local
     container_name: volume3
     ports:
       - "8003:8080" # localhost:8003 → volume3:8080 (matches --public-volumes[2])
     volumes:
-      - ./config/nginx-volume.conf:/etc/nginx/nginx.conf:ro
+      - ./nginx/nginx-volume.conf:/etc/nginx/nginx.conf:ro
       - volume3-data:/data
     networks:
       - minikv-net