Add JWT auth for protected routes, add /reg endpoint, remove /user endpoints

bin/database/migration.sql

@@ -6,11 +6,9 @@ CREATE TABLE IF NOT EXISTS users (
 
 CREATE TABLE IF NOT EXISTS geopositions (
     id SERIAL PRIMARY KEY,
-    user_id INTEGER NOT NULL REFERENCES users(id),
     x_value DOUBLE PRECISION NOT NULL,
     y_value DOUBLE PRECISION NOT NULL,
-    datetime TIMESTAMP NOT NULL DEFAULT NOW(),
-    lifetime INTERVAL NOT NULL,
+    last_update TIMESTAMP NOT NULL DEFAULT NOW(),
     expires_at TIMESTAMP NOT NULL
 );