Adding example docker compose file

.gitignore

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+.env

compose-example.yml

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+services:
+  ts:
+    image: 'tailscale/tailscale:latest'
+    hostname: $APPNAME
+    restart: 'always'
+    environment:
+      - "TS_AUTHKEY=$TS_AUTHKEY"
+      - "TS_EXTRA_ARGS=--advertise-tags=tag:container"
+      - "TS_USERSPACE=true"
+      - "TS_STATE_DIR=/var/lib/tailscale"
+    volumes:
+      - 'ts_state:/var/lib/tailscale'
+  svr:
+    build:
+      context: .
+    depends_on: 
+      - 'ts'
+    restart:      'always'    
+    network_mode: 'service:ts'
+volumes:
+  ts_state: