Reduce Docker context and fix emoji markdown rendering

.dockerignore

@@ -18,6 +18,8 @@ build/
 .vscode/
 .idea/
 dev-docs/
+docs/
+*.md
 *.db
 *.sqlite
 *.sqlite3

static/js/markdown.js

@@ -539,7 +539,7 @@ export function mdToHtml(src) {
     s = s.replace(`___CODE_BLOCK_${index}___`, block);
   });
 
-  return s;
+  return svgifyEmoji(s);
 }
 
 /**