chore: improvements to keycloak local development (#26518)

* update keycloak docker image

* update realm file with a compatible realm

* import realm on start-docker command

Since bitnami's image does not support importing directly, the import of the test realm is done in the make file start-docker action

* Use official image from quay

* updated realm keycloak config

* final note about nickname attrib for saml

* add admin user

* update realm

* Updated from master

* Updated docs

* local typo

* use jq for ldap and saml

* updated readme

server/build/docker/keycloak/ldap.mmsettings.json

@@ -0,0 +1,39 @@
+{
+    "LdapSettings": {
+        "Enable": true,
+        "EnableSync": false,
+        "LdapServer": "localhost",
+        "LdapPort": 389,
+        "ConnectionSecurity": "",
+        "BaseDN": "dc=mm,dc=test,dc=com",
+        "BindUsername": "cn=admin,dc=mm,dc=test,dc=com",
+        "BindPassword": "mostest",
+        "UserFilter": "",
+        "GroupFilter": "",
+        "GuestFilter": "",
+        "EnableAdminFilter": false,
+        "AdminFilter": "",
+        "GroupDisplayNameAttribute": "cn",
+        "GroupIdAttribute": "entryUUID",
+        "FirstNameAttribute": "cn",
+        "LastNameAttribute": "sn",
+        "EmailAttribute": "mail",
+        "UsernameAttribute": "uid",
+        "NicknameAttribute": "cn",
+        "IdAttribute": "uid",
+        "PositionAttribute": "title",
+        "LoginIdAttribute": "uid",
+        "PictureAttribute": "",
+        "SyncIntervalMinutes": 60,
+        "SkipCertificateVerification": false,
+        "PublicCertificateFile": "",
+        "PrivateKeyFile": "",
+        "QueryTimeout": 60,
+        "MaxPageSize": 0,
+        "LoginFieldName": "",
+        "LoginButtonColor": "#0000",
+        "LoginButtonBorderColor": "#2389D7",
+        "LoginButtonTextColor": "#2389D7",
+        "Trace": false
+    }
+}