fix: disable port in redirect for Nginx in Docker container

Dockerfile

@@ -9,9 +9,11 @@ RUN npm run build
 # Production-Phase
 FROM nginx:1.25
 
+# Eigene Nginx-Konfiguration kopieren
+COPY default.conf /etc/nginx/conf.d/default.conf
+
 # Nginx konfigurieren für non-root Port 8080
-RUN sed -i 's/listen\( \)*80;/listen 8080;/g' /etc/nginx/conf.d/default.conf && \
-    touch /var/run/nginx.pid && \
+RUN touch /var/run/nginx.pid && \
     chown -R nginx:nginx /var/run/nginx.pid /var/cache/nginx /var/log/nginx /etc/nginx/conf.d
 
 USER nginx

default.conf

@@ -0,0 +1,19 @@
+server {
+    listen 8080;
+    server_name localhost;
+    
+    # Verhindert, dass Nginx bei 301-Redirects (z.B. ohne Slash) den internen Port 8080 anhängt
+    port_in_redirect off;
+
+    location / {
+        root /usr/share/nginx/html;
+        index index.html index.htm;
+        try_files $uri $uri/ =404;
+    }
+
+    error_page 404 /404.html;
+    location = /404.html {
+        root /usr/share/nginx/html;
+        internal;
+    }
+}