Added Readme

README.md

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+# Very Simple PHP Gallery
+
+This is a very simple PHP based image Gallery. It takes all images from or (or potentially multiple) directories and presents them as a simple web gallery. It will autogenerate thumbnails for the gallery overview and also do variable pagination. There are some simple keyboard shortcuts as well.
+
+# Running it
+
+A webserver with PHP support and the php-gd extension (for thumbnails) is required. An example config for nginx with php-fpm might look like this:
+
+   worker_processes  4;
+
+    events {
+        worker_connections  256;
+    }
+
+
+    http {
+      include       mime.types;
+      default_type  application/octet-stream;
+
+      access_log    /var/log/nginx/access.log;
+      error_log     /var/log/nginx/error.log info;
+
+      sendfile        on;
+      keepalive_timeout  65;
+
+      upstream php-default-handler {
+        server unix:/run/php-fpm7/php-fpm.sock;
+      }
+
+      server {
+        listen 80;
+        listen [::]:80;
+        server_name gallery.example.com;
+
+        fastcgi_buffers 64 4K;
+
+        gzip on;
+        gzip_vary on;
+        gzip_comp_level 4;
+        gzip_min_length 256;
+        gzip_proxied expired no-cache no-store private no_last_modified no_etag auth;
+        gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy;
+
+        add_header Referrer-Policy                      "no-referrer"   always;
+        add_header X-Content-Type-Options               "nosniff"       always;
+        add_header X-Download-Options                   "noopen"        always;
+        add_header X-Frame-Options                      "SAMEORIGIN"    always;
+        add_header X-Permitted-Cross-Domain-Policies    "none"          always;
+        add_header X-Robots-Tag                         "none"          always;
+        add_header X-XSS-Protection                     "1; mode=block" always;
+
+        fastcgi_hide_header X-Powered-By;
+
+        root /var/www/gallery;
+
+        auth_basic           'Picture Gallery';
+        auth_basic_user_file /etc/nginx/gallery.users;
+
+        location = /robots.txt {
+            allow all;
+            log_not_found off;
+            access_log off;
+        }
+
+        location ~ ^/(?:lib|conf|tpl|cache)(?:$|/)  { return 404; }
+
+        location ~ \.php(?:$|/) {
+            fastcgi_split_path_info ^(.+?\.php)(/.*)$;
+            set $path_info $fastcgi_path_info;
+
+            try_files $fastcgi_script_name =404;
+
+            include fastcgi_params;
+            fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+            fastcgi_param PATH_INFO $path_info;
+            fastcgi_param HTTPS on;
+
+            fastcgi_param modHeadersAvailable true;         # Avoid sending the security headers twice
+            fastcgi_param front_controller_active true;     # Enable pretty urls
+            fastcgi_pass php-default-handler;
+
+            fastcgi_intercept_errors on;
+            fastcgi_read_timeout 300s;
+            fastcgi_request_buffering off;
+        }
+
+        location ^~ /images {
+          alias /path/to/imagedir;
+        }
+
+        location ^~ /thumbs {
+          alias /path/to/thumbnail/cache;
+        }
+
+        location ~ \.(?:css|js|jpeg|png|jpg|webm|webp|gif)$ {
+            expires 6M;
+        }
+
+        location / {
+          index index.php;
+        }
+      }
+    }