updated docs formatting and windows from source update guide

docs/guides/docker-guide.md

@@ -1,3 +1,35 @@
 # Setting up NadekoBot with Docker
 
-Soon:tm:
+# DO NOT USE YET - WORK IN PROGRESS
+
+Upgrade from 2.x to v3 does not work because the file is mount readonly
+
+### Docker Compose 
+```yml
+version: "3.7"
+services:
+  nadeko:
+    image: registry.gitlab.com/veovis/nadekobot:v3-docker
+    depends_on:
+      - redis
+    environment:
+      TZ: Europe/Paris
+      #NadekoBot_RedisOptions: redis,name=nadeko
+      #NadekoBot_ShardRunCommand: dotnet
+      #NadekoBot_ShardRunArguments: /app/NadekoBot.dll {0} {1}
+    volumes:
+      - /srv/nadeko/conf/creds.yml:/app/creds.yml:ro
+      - /srv/nadeko/data:/app/data
+
+  redis:
+    image: redis:4-alpine
+    sysctls:
+      - net.core.somaxconn=511
+    command: redis-server --maxmemory 32M --maxmemory-policy volatile-lru
+    volumes:
+      - /srv/nadeko/redis-data:/data
+```
+### Updating
+- `cd /srv/nadeko`
+- `docker-compose pull`
+- `docker-compose up -d`