diff --git a/code/websites/pokedex.online/deploy.sh b/code/websites/pokedex.online/deploy.sh
index cec0e5a..77c7a23 100755
--- a/code/websites/pokedex.online/deploy.sh
+++ b/code/websites/pokedex.online/deploy.sh
@@ -209,6 +209,41 @@ run_tests() {
 # Build
 ###############################################################################
 
+prepare_env_for_build() {
+    # Create/update .env.local with correct Discord redirect URI for the target
+    local env_file="$PROJECT_ROOT/.env.local"
+    local redirect_uri
+    
+    # Determine correct redirect URI based on target and ports
+    case "$TARGET" in
+        local)
+            # For Docker, use the frontend port
+            redirect_uri="http://localhost:${PORT}/oauth/callback"
+            ;;
+        internal|external)
+            # For dev server, use default Vite port
+            redirect_uri="http://localhost:5173/oauth/callback"
+            ;;
+        *)
+            redirect_uri="http://localhost:5173/oauth/callback"
+            ;;
+    esac
+    
+    log_info "Preparing environment for ${TARGET} deployment..."
+    log_info "Discord redirect URI: ${redirect_uri}"
+    
+    # Create/update .env.local with Discord credentials
+    cat > "$env_file" << EOF
+# Generated by deploy.sh for ${TARGET} deployment
+# These variables are embedded into the frontend bundle at build time
+
+VITE_DISCORD_CLIENT_ID=1466544972059775223
+VITE_DISCORD_REDIRECT_URI=${redirect_uri}
+EOF
+    
+    log_info ".env.local created with correct redirect URI"
+}
+
 build_application() {
     if [ "$SKIP_BUILD" = true ]; then
         log_warning "Skipping build (--skip-build flag set)"
@@ -224,6 +259,9 @@ build_application() {
     
     log_step "🔨 Building Application"
     
+    # Prepare environment before building
+    prepare_env_for_build
+    
     log_info "Building frontend..."
     npm run build:frontend || {
         log_error "Frontend build failed"