Add example docker compose files to the repository

docker/Caddyfile

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+{$GEOFEEDDOMAIN}:443 {
+  log {
+    level INFO
+    output file {$LOG_FILE} {
+      roll_size 10MB
+      roll_keep 10
+    }
+  }
+
+  # Use the ACME HTTP-01 challenge to get a cert for the configured domain.
+  tls {$EMAIL}
+  
+  reverse_proxy geofeed:80
+}

docker/docker-compose.yml

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+version: '3.7'
+services:
+  geofeed:
+    image: git.startmywifi.com/as1024/geofeed:latest
+    restart: always
+    volumes:
+      - './data:/data'
+    environment:
+      - ASPNETCORE_URLS=http://+:8080
+      - ConnectionString__LocalFeedCache=Data Source=/data/geofeed-cache.db
+      - APIKey=APIKeyHere
+      - NetBoxHost=netboxhosthere
+  caddy:
+    image: caddy:2
+    restart: always
+    ports:
+      - 80:80
+      - 443:443
+      - 443:443/udp
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile:ro
+      - ./caddy-config:/config
+      - ./caddy-data:/data
+    environment:
+      GEOFEEDDOMAIN: "https://geofeed.exampleas.net"
+      EMAIL: "noc@example.com"                 # The email address to use for ACME registration.
+      LOG_FILE: "/data/access.log"