Add environment configuration and local development documentation

- Parameterize CORS_ORIGINS in docker-compose.swarm.yml
- Add .env.example with configuration options
- Create comprehensive LOCAL_DEVELOPMENT.md guide
- Update README.md with environment variable documentation
- Provide alternatives for local development without production domain

🤖 Generated with [Claude Code](https://claude.ai/code)

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

frontend/node_modules/.package-lock.json

@@ -1456,7 +1456,6 @@
         "x64"
       ],
       "dev": true,
-      "ideallyInert": true,
       "license": "MIT",
       "optional": true,
       "os": [

frontend/node_modules/@rollup/rollup-linux-x64-musl/README.md

@@ -0,0 +1,3 @@
+# `@rollup/rollup-linux-x64-musl`
+
+This is the **x86_64-unknown-linux-musl** binary for `rollup`

frontend/node_modules/@rollup/rollup-linux-x64-musl/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "@rollup/rollup-linux-x64-musl",
+  "version": "4.44.2",
+  "os": [
+    "linux"
+  ],
+  "cpu": [
+    "x64"
+  ],
+  "files": [
+    "rollup.linux-x64-musl.node"
+  ],
+  "description": "Native bindings for Rollup",
+  "author": "Lukas Taegert-Atkinson",
+  "homepage": "https://rollupjs.org/",
+  "license": "MIT",
+  "repository": "rollup/rollup",
+  "libc": [
+    "musl"
+  ],
+  "main": "./rollup.linux-x64-musl.node"
+}