Add kubernetes examples + better document methods of applying authentication

Closes #33

examples/traefik-v1.7/swarm/docker-compose.yml

@@ -0,0 +1,39 @@
+version: '3'
+
+services:
+  traefik:
+    image: traefik:1.7
+    command: -c /traefik.toml --logLevel=DEBUG
+    ports:
+      - "8085:80"
+      - "8086:8080"
+    networks:
+      - traefik
+    volumes:
+      - ./traefik.toml:/traefik.toml
+      - /var/run/docker.sock:/var/run/docker.sock
+
+  whoami1:
+    image: emilevauge/whoami
+    networks:
+      - traefik
+    labels:
+      - "traefik.backend=whoami"
+      - "traefik.enable=true"
+      - "traefik.frontend.rule=Host:whoami.localhost.com"
+
+  traefik-forward-auth:
+    build: ../
+    command: ./traefik-forward-auth --rule.1.action=allow --rule.1.rule="Path(`/`)"
+    environment:
+      - PROVIDERS_GOOGLE_CLIENT_ID=your-client-id
+      - PROVIDERS_GOOGLE_CLIENT_SECRET=your-client-secret
+      - SECRET=something-random
+      - INSECURE_COOKIE=true
+      - DOMAIN=yourcompany.com
+      - LOG_LEVEL=debug
+    networks:
+      - traefik
+
+networks:
+  traefik: