Add labels to Docker images

Dockerfile

@@ -13,3 +13,8 @@ FROM nginx as ki-frontend
 
 COPY --from=builder /dist/ /usr/share/nginx/html/
 COPY etc/nginx/conf.d/default.conf /etc/nginx/conf.d/default.conf
+
+LABEL org.opencontainers.image.source=https://git.wtf-eg.de/kompetenzinventar/ki-frontend.git
+LABEL org.opencontainers.image.url=https://git.wtf-eg.de/kompetenzinventar/ki-frontend
+LABEL org.opencontainers.image.documentation=https://git.wtf-eg.de/kompetenzinventar/ki-frontend#docker
+LABEL org.opencontainers.image.vendor="WTF Kooperative eG"

etc/nginx/conf.d/default.conf

@@ -9,24 +9,10 @@ server {
 
     #access_log  /var/log/nginx/host.access.log  main;
 
-    root   /usr/share/nginx/html;
-
-    # routes without dots serve the index.html without caching
     location / {
-        add_header Cache-Control "no-cache";
-        try_files $uri $uri/index.html /index.html;
-    }
-  
-    # static js and css files that get replaced instead of updated
-    location ~ \.(js|css) {
-        add_header Cache-Control "public, max-age=31536000, immutable";
-        try_files $uri =404;
-    }
-  
-    # cache other static files for 30 days
-    location ~ \.(?!html) {
-        add_header Cache-Control "public, max-age=2592000";
-        try_files $uri =404;
+        root   /usr/share/nginx/html;
+        index  index.html index.htm;
+        try_files $uri $uri/ /index.html;
     }
 
     #error_page  404              /404.html;