MM-52642 CLD-6352 MM-54007 Prepare setup for Playwright pipeline (#24647)

* pipeline(playwright): prepare setup for playwright

* feedback address

* clean up readme

* Fix docker-compose command and definition for dashboard

* fix the dashboard

* ignore dashboard when formatting

---------

Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Mario Vitale <mvitale1989@hotmail.com>

e2e-tests/.ci/dashboard.start.sh

@@ -1,7 +1,8 @@
 #!/bin/bash
 set -e -u -o pipefail
-cd $(dirname $0)
+cd "$(dirname "$0")"
 . .e2erc
+. .e2erc_setup
 
 MME2E_DASHBOARD_REF_DEFAULT="origin/main"
 MME2E_DASHBOARD_REF=${MME2E_DASHBOARD_REF:-$MME2E_DASHBOARD_REF_DEFAULT}
@@ -9,26 +10,34 @@ MME2E_DASHBOARD_REF=${MME2E_DASHBOARD_REF:-$MME2E_DASHBOARD_REF_DEFAULT}
 mme2e_log "Cloning the automation-dashboard project"
 if [ ! -d dashboard ]; then
   git clone https://github.com/saturninoabril/automation-dashboard.git dashboard
-  . .e2erc # Must reinitialize some variables that depend on the dashboard repo being checked out
+  # Must reinitialize some variables that depend on the dashboard repo being checked out
+  . .e2erc
+  . .e2erc_setup
 fi
 git -C dashboard fetch
-git -C dashboard checkout $MME2E_DASHBOARD_REF
+git -C dashboard checkout "$MME2E_DASHBOARD_REF"
 
 mme2e_log "Starting the dashboard"
 ${MME2E_DC_DASHBOARD} up -d db dashboard
 
 mme2e_log "Generating the dashboard's local URL"
 case $MME2E_OSTYPE in
-  darwin )
-    AUTOMATION_DASHBOARD_IP=$(ifconfig $(route get 1.1.1.1 | grep interface | awk '{print $2}') | grep -w inet | awk '{print $2}') ;;
-  * )
-    MME2E_DC_DASHBOARD_NETWORK=$(docker inspect $(${MME2E_DC_DASHBOARD} ps -q dashboard) | jq -r '.[0].NetworkSettings.Networks | (keys|.[0])')
-    AUTOMATION_DASHBOARD_IP=$(docker network inspect $MME2E_DC_DASHBOARD_NETWORK | jq -r '.[0].IPAM.Config[0].Gateway')
+darwin)
+  # shellcheck disable=SC2046
+  AUTOMATION_DASHBOARD_IP=$(ifconfig $(route get 1.1.1.1 | grep interface | awk '{print $2}') | grep -w inet | awk '{print $2}')
+  ;;
+*)
+  # shellcheck disable=SC2046
+  MME2E_DC_DASHBOARD_NETWORK=$(docker inspect $(${MME2E_DC_DASHBOARD} ps -q dashboard) | jq -r '.[0].NetworkSettings.Networks | (keys|.[0])')
+  AUTOMATION_DASHBOARD_IP=$(docker network inspect "$MME2E_DC_DASHBOARD_NETWORK" | jq -r '.[0].IPAM.Config[0].Gateway')
+  ;;
 esac
+# shellcheck disable=SC2034
 AUTOMATION_DASHBOARD_URL="http://${AUTOMATION_DASHBOARD_IP}:4000/api"
 
 mme2e_log "Generating a signed JWT token for accessing the dashboard"
-${MME2E_DC_DASHBOARD} exec -T dashboard npm i
+${MME2E_DC_DASHBOARD} exec -T dashboard bash -c "rm -rf node_modules && npm install --cache /tmp/empty-cache"
+# shellcheck disable=SC2034
 AUTOMATION_DASHBOARD_TOKEN=$(${MME2E_DC_DASHBOARD} exec -T dashboard node script/sign.js | awk '{ print $2; }') # The token secret is specified in the dashboard.override.yml file
 
 mme2e_log "Generating the .env.dashboard file, to point Cypress to the dashboard URL"