docs: Add self-contained docker-compose.yml.example

Full stack example (hbbs + hbbr + rustdesk-api) with everything inline:
public endpoints, a fixed Ed25519 key pair (secret on the servers, public
on the API) and the JWT key. No .env required.

The included key is an example and should be regenerated for production.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docker-compose.yml.example

@@ -0,0 +1,64 @@
+# RustDesk full stack (server + relay + API/Web Admin) — self-contained example.
+#
+# Copy to docker-compose.yml and adjust the public IP / keys / secrets:
+#   cp docker-compose.yml.example docker-compose.yml
+#
+# Everything is inline (no .env). The Ed25519 key below is an EXAMPLE — generate
+# your own for production. The two keys belong together:
+#   - hbbs/hbbr get the SECRET key via -k
+#   - rustdesk-api gets the matching PUBLIC key via RUSTDESK_API_RUSTDESK_KEY
+# (the public key is also what clients see as their "Key").
+
+services:
+  hbbs:
+    container_name: hbbs
+    image: rustdesk/rustdesk-server:latest
+    command: hbbs -r 194.164.204.114:21117 -k 1jqLELJaIjaRtt1Tcj6BhqJ7DhT9WszBH/XUHrqJdhdg4K98HmANQFOpUx/vPZFRWnHPTYYHyIB8uH3Xxr8PTw==
+    environment:
+      - TZ=Europe/Berlin
+      - ENCRYPTED_ONLY=1
+      - MUST_LOGIN=Y
+    volumes:
+      - ./data/server:/root
+    ports:
+      - "21115:21115"
+      - "21116:21116"
+      - "21116:21116/udp"
+      - "21118:21118"
+    depends_on:
+      - hbbr
+    restart: unless-stopped
+
+  hbbr:
+    container_name: hbbr
+    image: rustdesk/rustdesk-server:latest
+    command: hbbr -k 1jqLELJaIjaRtt1Tcj6BhqJ7DhT9WszBH/XUHrqJdhdg4K98HmANQFOpUx/vPZFRWnHPTYYHyIB8uH3Xxr8PTw==
+    environment:
+      - TZ=Europe/Berlin
+    volumes:
+      - ./data/server:/root
+    ports:
+      - "21117:21117"
+      - "21119:21119"
+    restart: unless-stopped
+
+  rustdesk-api:
+    container_name: rustdesk-api
+    image: git.hackner.dev/thomas/rustdesk-api:latest
+    command: ["./apimain"]
+    environment:
+      - TZ=Europe/Berlin
+      - RUSTDESK_API_LANG=en
+      - RUSTDESK_API_RUSTDESK_ID_SERVER=194.164.204.114:21116
+      - RUSTDESK_API_RUSTDESK_RELAY_SERVER=194.164.204.114:21117
+      - RUSTDESK_API_RUSTDESK_API_SERVER=http://194.164.204.114:21114
+      - RUSTDESK_API_RUSTDESK_KEY=YOCvfB5gDUBTqVMf7z2RUVpxz02GB8iAfLh918a/D08=
+      - RUSTDESK_API_JWT_KEY=z5rt4z465rtzdh5sudtuzrutd66zz6
+    ports:
+      - "21114:21114"
+    volumes:
+      - ./api:/app/data
+    depends_on:
+      - hbbs
+      - hbbr
+    restart: unless-stopped