Image and caching optimizations

README.MD

@@ -2,7 +2,7 @@
 
 Open Signature Generator is a web based tool for generating and verifying handwritten-style signatures for documents. Signatures are saved as images with transparency and can be easily inserted into documents which need to be signed using LibreOffice, or any other document editing software.
 
-![Example Signature Image](https://osg.jkdev.org/example-signature-inverted.png)
+![Example Signature Image](https://osg.jkdev.org/example-signature-inverted.webp)
 
 ## Features
 

server.py

@@ -51,6 +51,8 @@ def run_server(host_ip, host_port, host_prefix, static_dir, database_connection,
                 'tools.staticdir.on': True,
                 'tools.staticdir.dir': static_dir,
                 'tools.staticdir.index': 'index.html',
+                'tools.expires.on': True,
+                'tools.expires.delay': 30*24*60*60, # 30 days
             },
         '/images': {
             'tools.caching.on': True,

web_content/index.html

@@ -21,8 +21,8 @@
         </div>
         
         <div class="signature-area">
-            <img src="example-signature.png" class="signature-image" alt="Signature" />
-            <img src="example-signature-inverted.png" class="signature-image signature-image-inverted hidden" alt="Signature" />
+            <img src="example-signature.webp" class="signature-image" alt="Signature" />
+            <img src="example-signature-inverted.webp" class="signature-image signature-image-inverted hidden" alt="Signature" />
             <div id="signature-line"></div>
             <svg class="copy-hint-arrow hidden" viewBox="0 -2 16 18">
                 <path fill-rule="evenodd" d="M14.854 4.854a.5.5 0 0 0 0-.708l-4-4a.5.5 0 0 0-.708.708L13.293 4H3.5A2.5 2.5 0 0 0 1 6.5v8a.5.5 0 0 0 1 0v-8A1.5 1.5 0 0 1 3.5 5h9.793l-3.147 3.146a.5.5 0 0 0 .708.708l4-4z"/>