server: WIP tantivy, cache slurps, use shared::compute_color,

server/src/config.rs

@@ -0,0 +1,7 @@
+use serde::Deserialize;
+#[derive(Deserialize)]
+pub struct Config {
+    pub newsreader_database_url: String,
+    pub newsreader_tantivy_db_path: String,
+    pub slurp_cache_path: String,
+}