Refactor nginx configuration handling for dynamic subfolder support and improve asset caching

Dockerfile

@@ -35,14 +35,13 @@ RUN if [ -n "$APP_SUBFOLDER" ]; then mkdir -p /usr/share/nginx/html/$APP_SUBFOLD
 # Copy built application
 COPY --from=builder /app/build /usr/share/nginx/html/${APP_SUBFOLDER}
 
-# Copy and configure nginx
-COPY nginx.conf /tmp/nginx.conf.template
-# Generate nginx.conf with correct subfolder path
-RUN if [ -n "$APP_SUBFOLDER" ]; then \
-        sed "s|# SUBFOLDER_PLACEHOLDER|location /$APP_SUBFOLDER/ { try_files \$uri \$uri/ /$APP_SUBFOLDER/index.html; }|g" /tmp/nginx.conf.template > /etc/nginx/nginx.conf; \
-    else \
-        sed "s|# SUBFOLDER_PLACEHOLDER||g" /tmp/nginx.conf.template > /etc/nginx/nginx.conf; \
-    fi
+# Copy nginx configuration files
+COPY nginx/nginx.conf /tmp/nginx.conf.template
+COPY nginx/configure-nginx.sh /usr/local/bin/configure-nginx.sh
+RUN chmod +x /usr/local/bin/configure-nginx.sh
+
+# Generate nginx.conf with correct subfolder configuration
+RUN /usr/local/bin/configure-nginx.sh
 
 # Add environment variables
 ENV Author="Tudor Stanciu"

nginx/configure-nginx.sh

@@ -0,0 +1,34 @@
+#!/bin/sh
+
+# Configure nginx.conf based on APP_SUBFOLDER environment variable
+# This script generates the appropriate nginx configuration for SPA deployments
+
+TEMPLATE_FILE="/tmp/nginx.conf.template"
+OUTPUT_FILE="/etc/nginx/nginx.conf"
+
+if [ -n "$APP_SUBFOLDER" ]; then
+    echo "Configuring nginx for subfolder deployment: /$APP_SUBFOLDER/"
+    
+    # Generate location block for subfolder with proper static assets handling
+    SUBFOLDER_CONFIG="        # Subfolder-specific configuration for /$APP_SUBFOLDER/
+        location /$APP_SUBFOLDER/ {
+            # Handle static assets in subfolder
+            location ~* /$APP_SUBFOLDER/.*\.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|json)$ {
+                expires 1y;
+                add_header Cache-Control \"public, immutable\";
+                try_files \$uri =404;
+            }
+            
+            # SPA routing for subfolder
+            try_files \$uri \$uri/ /$APP_SUBFOLDER/index.html;
+        }"
+    
+    # Replace placeholder with subfolder configuration
+    sed "s|        # SUBFOLDER_PLACEHOLDER|$SUBFOLDER_CONFIG|g" "$TEMPLATE_FILE" > "$OUTPUT_FILE"
+else
+    echo "Configuring nginx for root deployment"
+    # Remove placeholder for root deployment
+    sed "s|        # SUBFOLDER_PLACEHOLDER||g" "$TEMPLATE_FILE" > "$OUTPUT_FILE"
+fi
+
+echo "Nginx configuration generated successfully"