diff --git a/.gitignore b/.gitignore
index 4de337b..7497efc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,4 +30,5 @@ uploads/*
 
 .idea
 
-data/persons.json*
\ No newline at end of file
+data/persons.json*
+persons.json
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..10519eb
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,17 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "type": "node",
+      "request": "launch",
+      "name": "Launch Program",
+      "skipFiles": [
+        "<node_internals>/**"
+      ],
+      "program": "${workspaceFolder}\\index.js"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/modules/postgres.js b/modules/postgres.js
index 25885e8..89b517c 100644
--- a/modules/postgres.js
+++ b/modules/postgres.js
@@ -1,103 +1,127 @@
-var pg = require('pg');
+var pg = require("pg");
+var path = require("path");
+var fs = require("fs");
 var connectionString = process.env.PRODUCTION
-    ? process.env.DATABASE_URL
-    : 'postgres://postgres:12qw34er56ty@localhost:5432/postgres';
+  ? process.env.DATABASE_URL
+  : "postgres://postgres:12qw34er56ty@localhost:5432/postgres";
 
 function createClient() {
-    return new pg.Client({ connectionString, ssl: { rejectUnauthorized: false } });
+  return new pg.Client({
+    connectionString,
+    ssl: { rejectUnauthorized: false },
+  });
+}
+
+function readPersonsFile() {
+  var content;
+  try {
+    content = fs.readFileSync(path.resolve(__dirname, "..", "persons.json"), {
+      encoding: "utf8",
+    });
+  } catch (e) {}
+  return content ? JSON.parse(content) : null;
 }
 
 function createTableIf(cb) {
-    var client = createClient();
-    client.connect();
-    client.query('SELECT * FROM files', function (err, result) {
-        if (err) {
+  var client = createClient();
+  client.connect();
+  client.query("SELECT * FROM files", function (err, result) {
+    if (err) {
+      client.query(
+        "CREATE TABLE files(id SERIAL PRIMARY KEY, body VARCHAR(10000000))",
+        function (err, result) {
+          if (err) {
+            client.end();
+            cb(err);
+          } else {
             client.query(
-                'CREATE TABLE files(id SERIAL PRIMARY KEY, body VARCHAR(10000000))',
-                function (err, result) {
-                    if (err) {
-                        client.end();
-                        cb(err);
-                    } else {
-                        client.query(
-                            'INSERT INTO files(body) VALUES($1)',
-                            ['{}'],
-                            function (err, result) {
-                                if (err) {
-                                    client.end();
-                                    cb(err);
-                                } else {
-                                    cb();
-                                }
-                            }
-                        );
-                    }
+              "INSERT INTO files(body) VALUES($1)",
+              ["{}"],
+              function (err, result) {
+                if (err) {
+                  client.end();
+                  cb(err);
+                } else {
+                  cb();
                 }
+              }
             );
-        } else {
-            client.end();
-            cb();
+          }
         }
-    });
+      );
+    } else {
+      client.end();
+      cb();
+    }
+  });
 }
 
 function select(sql, pars, cb) {
-    var client = createClient();
-    var fn = function (err, result) {
-        if (err) {
-            cb(err);
-        } else {
-            client.end();
-            cb(null, result);
-        }
-    };
-    client.connect(function (err) {
-        if (err) {
-            cb(err);
-        }
-        client.query(sql, pars ? pars : fn, pars ? fn : undefined);
-    });
+  var client = createClient();
+  var fn = function (err, result) {
+    if (err) {
+      cb(err);
+    } else {
+      client.end();
+      cb(null, result);
+    }
+  };
+  client.connect(function (err) {
+    if (err) {
+      cb(err);
+    }
+    client.query(sql, pars ? pars : fn, pars ? fn : undefined);
+  });
 }
 
 function wrap(cb) {
-    createTableIf(function (err) {
-        if (err) {
-            cb(err);
-        } else {
-            cb();
-        }
-    });
+  createTableIf(function (err) {
+    if (err) {
+      cb(err);
+    } else {
+      cb();
+    }
+  });
 }
 
 module.exports = {
-    getPersonsJson: function (cb) {
-        wrap(function (err) {
-            if (err) {
-                cb(err);
-            } else {
-                select('SELECT * FROM files', null, function (err, result) {
-                    if (err) {
-                        cb(err);
-                    } else {
-                        cb(null, JSON.parse(result.rows[0].body));
-                    }
-                });
-            }
+  getPersonsJson: function (cb) {
+    var personsFromFile = readPersonsFile();
+    if (personsFromFile) {
+      cb(null, personsFromFile);
+      return;
+    }
+    wrap(function (err) {
+      if (err) {
+        cb(err);
+      } else {
+        select("SELECT * FROM files", null, function (err, result) {
+          if (err) {
+            cb(err);
+          } else {
+            cb(null, JSON.parse(result.rows[0].body));
+          }
         });
-    },
-    setPersons: function (strPersons, cb) {
-        wrap(function (err) {
+      }
+    });
+  },
+  setPersons: function (strPersons, cb) {
+    wrap(function (err) {
+      if (err) {
+        cb(err);
+      } else {
+        select(
+          "UPDATE files SET body = ($1)",
+          [strPersons],
+          function (err, result) {
             if (err) {
-                cb(err);
+              cb(err);
             } else {
-                select('UPDATE files SET body = ($1)', [strPersons], function (err, result) {
-                    if (err) {
-                        cb(err);
-                    } else {
-                        cb();
-                    }
-                });
+              cb();
             }
-        });
-    },
+          }
+        );
+      }
+    });
+  },
 };
diff --git a/package-lock.json b/package-lock.json
index 4ce3df3..e30ceb9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
         "winston": "1.0.x"
       },
       "engines": {
-        "node": "4.2.x"
+        "node": "14.15.x"
       }
     },
     "node_modules/@types/node": {
@@ -819,8 +819,7 @@
         "esprima": "^4.0.1",
         "estraverse": "^4.2.0",
         "esutils": "^2.0.2",
-        "optionator": "^0.8.1",
-        "source-map": "~0.6.1"
+        "optionator": "^0.8.1"
       },
       "bin": {
         "escodegen": "bin/escodegen.js",
@@ -1296,7 +1295,6 @@
         "dom-serializer": "~0.1.0",
         "entities": "~1.1.1",
         "htmlparser2": "~3.8.1",
-        "jsdom": "^7.0.2",
         "lodash": "^4.1.0"
       },
       "engines": {
@@ -1528,9 +1526,6 @@
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-4.0.0.tgz",
       "integrity": "sha1-h3Gq4HmbZAdrdmQPygWPnBDjPss=",
-      "dependencies": {
-        "graceful-fs": "^4.1.6"
-      },
       "optionalDependencies": {
         "graceful-fs": "^4.1.6"
       }
@@ -1569,16 +1564,6 @@
       "version": "2.7.3",
       "resolved": "https://registry.npmjs.org/less/-/less-2.7.3.tgz",
       "integrity": "sha512-KPdIJKWcEAb02TuJtaLrhue0krtRLoRoo7x6BNJIBelO00t/CCdJQUnHW5V34OnHMWzIktSalJxRO+FvytQlCQ==",
-      "dependencies": {
-        "errno": "^0.1.1",
-        "graceful-fs": "^4.1.2",
-        "image-size": "~0.5.0",
-        "mime": "^1.2.11",
-        "mkdirp": "^0.5.0",
-        "promise": "^7.1.1",
-        "request": "2.81.0",
-        "source-map": "^0.5.3"
-      },
       "bin": {
         "lessc": "bin/lessc"
       },
@@ -2491,20 +2476,13 @@
         "node >= 0.8.0"
       ],
       "dependencies": {
-        "aws-sign2": "~0.5.0",
         "bl": "~0.9.0",
         "caseless": "~0.6.0",
         "forever-agent": "~0.5.0",
-        "form-data": "~0.1.0",
-        "hawk": "1.1.1",
-        "http-signature": "~0.10.0",
         "json-stringify-safe": "~5.0.0",
         "mime-types": "~1.0.1",
         "node-uuid": "~1.4.0",
-        "oauth-sign": "~0.4.0",
         "qs": "~1.2.0",
-        "stringstream": "~0.0.4",
-        "tough-cookie": ">=0.12.0",
         "tunnel-agent": "~0.4.0"
       },
       "optionalDependencies": {