WIP: add basic docker setup instructions

Docker.md

@@ -0,0 +1,33 @@
+# Run the Darkflame Server inside Docker
+
+### What you need
+
+- Docker (Docker Desktop or on Linux normal Docker)
+- Docker-Compose (Included in Docker Desktop)
+- LEGO® Universe Client
+
+### Run server inside Docker
+
+1. Copy `.env.example` and save it as `.env` inside the root directory of this repository
+2. Edit the `.env` file and add your path to your LEGO® Universe Client after `CLIENT_PATH=`
+3. Add some random long string after `ACCOUNT_MANAGER_SECRET=` in the `.env` file
+4. (Optional) You can decrease the build time if you change number behind `BUILD_THREADS=` in the `.env` file. You should change it to the number of threads your system have.
+5. Run `docker compose up -d --build` or `docker-compose up -d --build` and wait for it to complete
+6. Now you can see the output of the server with `docker compose logs -f --tail 100` or `docker-compose logs -f --tail 100`. This can help you understand issues and there you can also see when the server finishes it's startup.
+
+
+### Disable brickbuildfix
+
+If you don't need the http server running on port 80 do this:
+
+1. Create a file with the name `docker-compose.override.yml`
+2. Paste this content:
+
+```yml
+services:
+  brickbuildfix:
+    profiles:
+      - donotstart
+```
+
+4. Now run `docker compose up -d --build` or `docker-compose up -d --build`