Add self-contained Docker Compose stacks for pivoine.art infrastructure

Migrated 11 services from monolithic docker-compose project into independent stacks,
each with dedicated databases, minimal .env configuration, and bind-mount data volumes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

traefik/dynamic/security.yaml

@@ -0,0 +1,43 @@
+tls:
+  options:
+    default:
+      minVersion: VersionTLS12
+      cipherSuites:
+        - TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
+        - TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
+        - TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305
+        - TLS_AES_128_GCM_SHA256
+        - TLS_AES_256_GCM_SHA384
+        - TLS_CHACHA20_POLY1305_SHA256
+      curvePreferences:
+        - CurveP521
+        - CurveP384
+      sniStrict: true
+
+http:
+  middlewares:
+    security-headers:
+      headers:
+        stsSeconds: 31536000
+        stsIncludeSubdomains: true
+        stsPreload: true
+        forceSTSHeader: true
+        customFrameOptionsValue: "SAMEORIGIN"
+        browserXssFilter: true
+        contentTypeNosniff: true
+        referrerPolicy: "strict-origin-when-cross-origin"
+        customResponseHeaders:
+          X-Robots-Tag: "none,noarchive,nosnippet,notranslate,noimageindex"
+          Permissions-Policy: "camera=(), microphone=(), geolocation=(), payment=(), usb=(), magnetometer=(), accelerometer=(), gyroscope=()"
+          X-Content-Type-Options: "nosniff"
+          X-Frame-Options: "SAMEORIGIN"
+    rate-limit:
+      rateLimit:
+        average: 100
+        burst: 50
+        period: 1s
+    api-rate-limit:
+      rateLimit:
+        average: 30
+        burst: 15
+        period: 1s