Split compose dev/prod and relax contact form friction.

Use compose.dev.yaml and compose.prod.yaml with fixed Go cache mounts, block sudo make dev, build Air outside app/tmp for rootless Docker, soften English spam checks, and simplify contact error copy.

Co-authored-by: Cursor <cursoragent@cursor.com>

compose.prod.yaml

@@ -0,0 +1,27 @@
+# Production website (built image, gallery on host).
+# Run: make up
+
+services:
+  website:
+    image: technical.kiwi/website
+    container_name: technicalkiwi
+    build:
+      context: .
+      dockerfile: Dockerfile
+    volumes:
+      - ./app/images:/app/images
+    env_file:
+      - .env
+    environment:
+      IMAGES_DIR: /app/images
+    networks:
+      - caddy
+    labels:
+      caddy: technical.kiwi
+      caddy.reverse_proxy: "{{upstreams 8080}}"
+      caddy.tls: "admin@technical.kiwi"
+
+networks:
+  caddy:
+    external: true
+    name: caddy