feat: configurable backend url

.env.example

@@ -1,17 +1,18 @@
 # The base URL of the application, e.g., http://localhost:3000 or https://letterfeed.example.com
-LETTERFEED_APP_BASE_URL=http://localhost:3000
+# LETTERFEED_APP_BASE_URL=http://localhost:3000
+# LETTERFEED_BACKEND_URL=http://backend:8000 # URL of the backend service
 
 # The database URL. Change this if you change the volume mount point
-LETTERFEED_DATABASE_URL=sqlite:////data/letterfeed.db
+# LETTERFEED_DATABASE_URL=sqlite:////data/letterfeed.db
 
 # IMAP server settings. Must have IMAP over SSL on port 993
-LETTERFEED_IMAP_SERVER=
-LETTERFEED_IMAP_USERNAME=
-LETTERFEED_IMAP_PASSWORD=
+# LETTERFEED_IMAP_SERVER=
+# LETTERFEED_IMAP_USERNAME=
+# LETTERFEED_IMAP_PASSWORD=
 
 # Email processing settings
-LETTERFEED_SEARCH_FOLDER=INBOX # The folder in which to search for new emails
-# LETTERFEED_MOVE_TO_FOLDER= # Optional: Folder to move processed emails
+# LETTERFEED_SEARCH_FOLDER=INBOX # The folder in which to search for new emails
+# LETTERFEED_MOVE_TO_FOLDER= # Folder to move processed emails
 # LETTERFEED_MARK_AS_READ=true # Mark processed emails as read
 # LETTERFEED_EMAIL_CHECK_INTERVAL=15 # Interval between checks for new emails
 # LETTERFEED_AUTO_ADD_NEW_SENDERS=false # Automatically set up new emails for unknown senders

docker-compose.dev.yml

@@ -16,6 +16,8 @@ services:
       context: ./frontend
       dockerfile: Dockerfile
     restart: unless-stopped
+    env_file:
+      - .env
     ports:
       - "3000:3000"
     depends_on:

docker-compose.yml

@@ -12,6 +12,8 @@ services:
   frontend:
     image: ghcr.io/leonmuscoden/letterfeed-frontend:latest
     restart: unless-stopped
+    env_file:
+      - .env
     ports:
       - "3000:3000"
     depends_on:

frontend/next.config.ts

@@ -2,10 +2,11 @@ import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
   async rewrites() {
+    const backendUrl = process.env.LETTERFEED_BACKEND_URL || "http://backend:8000";
     return [
       {
-        source: '/api/:path*',
-        destination: 'http://backend:8000/:path*',
+        source: "/api/:path*",
+        destination: `${backendUrl}/:path*`,
       },
     ];
   },