fix: clean up Docker setup (compose, README, gitignore)

- Remove deprecated version field from docker-compose.yml
- Pin Postgres to 18-alpine (matches existing db-data)
- Remove undocumented web (Apache) service
- Fix config/bin volume mounts to use docker/ directory
- Gitignore docker/savedata, docker/bin, docker/config.json
- Rewrite docker/README.md: fix typos, use docker compose V2
  commands, match actual compose file behavior
- Link docker/README.md from main README Docker section

docker/docker-compose.yml

@@ -1,18 +1,16 @@
-version: "3.9"
-# 1. docker-compose up db pgadmin
-# 2. Use pgadmin to restore db and also apply patch-schema
-# 3. Configure the config.json example. in docker you can point to the service name for the database i.e db
-# 4. In seperate terminal docker-compose up server
-# 5. If all went well happy hunting!
-services: 
+# 1. Copy config.example.json to docker/config.json and edit it
+#    (set Database.Host to "db", adjust password to match below)
+# 2. Place quest/scenario files in docker/bin/
+# 3. docker compose up
+services:
   db:
-    image: postgres
+    image: postgres:18-alpine
     environment:
-    # (Make sure these match config.json)
+      # Change this password and match it in docker/config.json
       - POSTGRES_USER=postgres
       - POSTGRES_PASSWORD=password
       - POSTGRES_DB=erupe
-    ports: 
+    ports:
       - "5432:5432"
     volumes:
       - ./db-data/:/var/lib/postgresql/data/
@@ -44,8 +42,8 @@ services:
     # build:
     #   context: ../
     volumes:
-      - ../config.json:/app/erupe/config.json
-      - ../bin:/app/erupe/bin
+      - ./config.json:/app/erupe/config.json
+      - ./bin:/app/erupe/bin
       - ./savedata:/app/erupe/savedata
     ports:
       # (Make sure these match config.json)
@@ -53,7 +51,7 @@ services:
       - "8080:8080"   #Sign V2
       - "53310:53310" #Entrance
       # Channels
-      - "54001:54001" 
+      - "54001:54001"
       - "54002:54002"
       - "54003:54003"
       - "54004:54004"
@@ -61,13 +59,3 @@ services:
       - "54006:54006"
       - "54007:54007"
       - "54008:54008"
-  web:
-    image: httpd:latest
-    container_name: my-apache-app
-    ports:
-      - '80:80'
-    volumes:
-      - ./Servers:/usr/local/apache2/htdocs
-    depends_on:
-      db:
-        condition: service_healthy