add nginx configuration option for single page apps

.drone.yml

@@ -33,7 +33,7 @@ steps:
         from_secret: drone_abra-bot_token
       fork: true
       repositories:
-        - coop-cloud/auto-recipes-catalogue-json
+        - toolshed/auto-recipes-catalogue-json
 
 trigger:
   event: tag

.env.sample

@@ -23,3 +23,6 @@ COMPOSE_FILE="compose.yml"
 # temporary or permanent redirect? (uncomment one)
 #REDIRECT_TYPE=redirect
 #REDIRECT_TYPE=permanent
+
+# Optionally handle all URL requests using a single file (commonly index.html)
+#SINGLE_PAGE_SITE_HANDLER=/index.html

default.conf.tmpl

@@ -15,7 +15,11 @@ server {
             rewrite ^{{ env "REDIRECT_FROM_PATH" }}(.*)$ {{ env "REDIRECT_TO_URL" }}$1 {{ env "REDIRECT_TYPE" }}; 
         {{ end }}
 
-		try_files $uri $uri/ $uri.html =404;
+        {{ if env "SINGLE_PAGE_SITE_HANDLER" }}
+		try_files $uri $uri/ {{ env "SINGLE_PAGE_SITE_HANDLER" }} =404;
+        {{ else }}
+        try_files $uri $uri/ $uri.html =404;
+        {{ end }}
     }
 
     error_page  404              /404.html;