Add deployment pipeline and clean up repo

- Add Dockerfile, docker-compose.yml, .dockerignore, .env (port 3842)
- Add Caddyfile.snippet for analytics gateway import pattern
- Add .gitea/workflows/deploy.yaml for act_runner SSH deploy
- Untrack sensitive/data files (SCPA xlsx, owners.rds)
- Add renv lockfile and infrastructure files
- Reorganize data-raw scripts and add SarasotaCounty boundary data
- Move www assets to www/images/, add docs PDFs

docker-compose.yml

@@ -0,0 +1,18 @@
+services:
+  shiny:
+    build: .
+    container_name: standrews_shiny
+    restart: always
+    ports:
+      - "127.0.0.1:${PORT}:3838"
+    environment:
+      - SHINY_LOG_STDERR=1
+    volumes:
+      - .:/srv/shiny-server
+      # Prevents local renv library from shadowing the container's library
+      - /srv/shiny-server/renv/library
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:3838/"]
+      interval: 1m
+      timeout: 10s
+      retries: 3