README.md: move sthash description to nodejs/sthash.js

README.md

@@ -10,34 +10,6 @@ With a pre-loaded patient historical track data, user can drag/drop in their tra
 Note that all comparisons are happening in the local. Nothing is uploaded to server. This can
 ensure the user's privacy is protected.
 
-# NodeJs for Spacetime hash
-
-To protect patient's privacy, we employ a simple hash algorithm called ST hash (SpaceTime hash)
-to hash (time point, lat, lng) into a 64-bit value. Then, when user wants to compare their
-historical track, they follow the same hash algorithm. If a conflict happens, it means the user
-and the patient have had met at a particular spacetime point.
-
-The following commands are used to generate the hashed JSON file.
-
-```
-  # Node.js v12.x:
-  curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -
-  sudo apt-get install -y nodejs
-  npm install js-sha256 fs yargs fast-xml-parser csv-parse
-
-  node nodejs/sthash.js
-  node nodejs/sthash.js -d "your description" --remove_top 3
-                        -i INPUT_FILE.{kml|json} -o OUTPUT_FILE-hashed.json
-```
-
-Once the hashed JSON is generated, host it in somewhere (remember to enable Allow- headers
-so that it follows the CORS policy), and use hashes= parameter in the URL to load it:
-
-```
-  https://pandemic.events/?hashes=YOUR_HASHED_FILE_URL
-```
-
-
 # Contribution
 
 ## Testing

nodejs/sthash.js

@@ -1,4 +1,27 @@
-// Command line tools to generate hashed point data.
+// To protect patient's privacy, we employ a simple hash algorithm called ST hash (SpaceTime hash)
+// to hash (time point, lat, lng) into a 64-bit value. Then, when user wants to compare their
+// historical track, they follow the same hash algorithm. If a conflict happens, it means the user
+// and the patient have had met at a particular spacetime point.
+//
+// The following commands are used to generate the hashed JSON file.
+//
+// ```
+//   # Node.js v12.x:
+//   curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -
+//   sudo apt-get install -y nodejs
+//   npm install js-sha256 fs yargs fast-xml-parser csv-parse
+//
+//   node nodejs/sthash.js
+//   node nodejs/sthash.js -d "your description" --remove_top 3
+//                         -i INPUT_FILE.{kml|json} -o OUTPUT_FILE-hashed.json
+// ```
+//
+// Once the hashed JSON is generated, host it in somewhere (remember to enable Allow- headers
+// so that it follows the CORS policy), and use hashes= parameter in the URL to load it:
+//
+// ```
+//   https://pandemic.events/?hashes=YOUR_HASHED_FILE_URL
+// ```
 //
 // TODO: --remove-weekdays --timezone
 // TODO: --compress: to use gzip to compress data.