🌟 Data migration tool from nextcloud (#299)

- created server configuration
 - implemented downloading files from nextcloud to a local directory
 - build of the docker image added to the GutHub workflow
 - Twake client added
 - Creating user in Twake Drive from ldap
 - Ldap client with ldapsearch(TODO make it work with ldapjs)
 - Jest debug tests

tdrive/backend/utils/nextcloud-migration/src/shell_ldap_user.ts

@@ -0,0 +1,50 @@
+import { LdapConfiguration, User } from './ldap_user';
+import { exec } from 'child_process';
+import ldif from 'ldif';
+
+export class LdapUser {
+
+  private config: LdapConfiguration;
+
+  constructor(config: LdapConfiguration) {
+    this.config = config;
+  }
+
+  async find(username: string): Promise<User> {
+    return new Promise((resolve, reject) => {
+      let cmd = `ldapsearch -x -H ${this.config.url} -b '${this.config.baseDn}' '(uid=${username})'`;
+      console.log("Executing command to get data from LDAP for " + username);
+      exec(cmd, (error, stdout, stderr) => {
+        if (stderr) {
+          console.log("ERROR: " + stderr);
+        }
+        if (error) {
+          console.log(`ERROR running sync for the user: ${error.message}`);
+          reject(new Error(error.message));
+        } else {
+          if (stdout) {
+            try {
+              if (stdout.lastIndexOf("# search result") > 0) {
+                stdout = stdout.substring(0, stdout.lastIndexOf("# search result"))
+              }
+              let obj =  ldif.parse(stdout).shift().toObject({});
+              console.log(obj);
+              resolve({
+                lastName: obj.attributes.sn,
+                firstName: obj.attributes.givenName,
+                email: obj.attributes.mail,
+                uid: obj.attributes.uid} as User);
+            } catch (e) {
+              console.error(e)
+              resolve({ } as User);
+            }
+          } else {
+            console.log("No user");
+            resolve({ } as User);
+          }
+        }
+      });
+    });
+  }
+
+}