refactor: improved web cache

gulpfile.js

@@ -60,6 +60,10 @@ const styles = (cb) => {
     const items = paths.styles.bundles[name];
 
     src(items)
+      .pipe(replace(
+        "{BUILD_TIME}",
+        Math.floor(Date.now() / 1000)
+      ))
       .pipe(postcss([
         cssnano({ preset: 'advanced' })
       ]))
@@ -78,6 +82,10 @@ const scripts = (cb) => {
     const items = paths.scripts.bundles[name];
 
     src(items)
+      .pipe(replace(
+        "{BUILD_TIME}",
+        Math.floor(Date.now() / 1000)
+      ))
       .pipe(terser().on('error', console.error))
       .pipe(concat(name))
       .pipe(gzip({
@@ -94,6 +102,10 @@ const jsonFiles = (cb) => {
     const item = paths.json[i];
 
     src(item.src)
+      .pipe(replace(
+        "{BUILD_TIME}",
+        Math.floor(Date.now() / 1000)
+      ))
       .pipe(jsonminify())
       .pipe(gzip({
         append: true