Update docker, nginx

Dockerfile

@@ -12,14 +12,14 @@ FROM nginx:alpine
 
 # Copy React build
 COPY --from=build /app/dist /usr/share/nginx/html
+# (if CRA, replace dist with build)
 
-# Copy custom config
-COPY nginx.conf /etc/nginx/conf.d/default.conf
+# Override full nginx.conf
+COPY nginx.conf /etc/nginx/nginx.conf
 
-# Remove PID directive from nginx.conf to avoid permission issues
-RUN sed -i '/pid\s\+/d' /etc/nginx/nginx.conf && \
-    mkdir -p /tmp/nginx /var/cache/nginx && \
+# Ensure writable dirs
+RUN mkdir -p /tmp/nginx /var/cache/nginx && \
     chmod -R 777 /tmp/nginx /var/cache/nginx
 
 EXPOSE 7860
-CMD ["nginx", "-g", "daemon off;"]
+CMD ["nginx", "-g", "daemon off;"]

nginx.conf

@@ -1,11 +1,26 @@
-server {
-    listen 7860;
-    server_name localhost;
+worker_processes 1;
 
-    root /usr/share/nginx/html;
-    index index.html;
+# Write pid to /tmp (writable by non-root)
+pid /tmp/nginx.pid;
 
-    location / {
-        try_files $uri /index.html;
+events { worker_connections 1024; }
+
+http {
+    include       mime.types;
+    default_type  application/octet-stream;
+
+    sendfile        on;
+    keepalive_timeout  65;
+
+    server {
+        listen 7860;
+        server_name localhost;
+
+        root /usr/share/nginx/html;
+        index index.html;
+
+        location / {
+            try_files $uri /index.html;
+        }
     }
 }