Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/config.mk

@@ -0,0 +1,27 @@
+# Do not modify this file, if you want to configure your own environment copy
+# this file in config.override.mk and modify that file, or defining environment
+# variables using the same names found here.
+
+# Enable services to be run in docker.
+#
+# Possible options: mysql, postgres, minio, inbucket, openldap, dejavu,
+# keycloak, elasticsearch, prometheus, and grafana.
+#
+# Must be space separated names.
+#
+# Example: mysql postgres elasticsearch
+ENABLED_DOCKER_SERVICES ?= mysql postgres inbucket
+
+# Disable entirely the use of docker
+MM_NO_DOCKER ?= false
+
+# Run the server in the background
+RUN_SERVER_IN_BACKGROUND ?= true
+
+# Data loaded by default in openldap when container starts.
+#
+# Possible options: test or qa
+LDAP_DATA ?= test
+
+# Mock the CWS.
+MM_ENABLE_CWS_MOCK ?= false