Replaced network and tag files with SQLite database.

package.json

@@ -6,7 +6,13 @@
     "scripts": {
         "start": "node src/app.js",
         "eslint": "eslint src/",
-        "eslint-watch": "esw --watch src/"
+        "eslint-watch": "esw --watch src/",
+        "knex": "knex",
+        "migrate-make": "knex-migrate generate",
+        "migrate": "knex-migrate up",
+        "rollback": "knex-migrate down",
+        "seed-make": "knex seed:make",
+        "seed": "knex seed:run"
     },
     "repository": {
         "type": "git",
@@ -36,10 +42,13 @@
         "cheerio": "^1.0.0-rc.2",
         "clipboardy": "^1.2.3",
         "config": "^3.0.1",
+        "knex": "^0.16.3",
+        "knex-migrate": "^1.7.1",
         "moment": "^2.24.0",
         "neo-blessed": "^0.2.0",
         "node-fetch": "^2.3.0",
         "opn": "^5.4.0",
+        "sqlite3": "^4.0.6",
         "tty-table": "^2.7.0",
         "yargs": "^13.2.2"
     }