Add default SiteURL so that the app bootstraps without manual setting

pica-mattermost/docker-compose.yml

@@ -27,6 +27,7 @@ services:
       - /etc/localtime:/etc/localtime:ro
     environment:
       - DB_HOST=mattermost-db
+      - MM_SITEURL=team.picasoft.net
     env_file: ./secrets/mattermost-db.secrets
     labels:
       - "traefik.frontend.rule=Host:team.picasoft.net"

pica-mattermost/entrypoint.sh

@@ -10,6 +10,7 @@ DB_HOST=${DB_HOST:-db}
 DB_PORT_NUMBER=${DB_PORT_NUMBER:-5432}
 MM_DBNAME=${MM_DBNAME:-mattermost}
 MM_CONFIG=${MM_CONFIG:-/mattermost/config/config.json}
+MM_SITEURL=${MM_SITEURL:-team.picasoft.net}
 
 if [ "${1:0:1}" = '-' ]; then
     set -- mattermost "$@"
@@ -33,6 +34,7 @@ if [ "$1" = 'mattermost' ]; then
     # Copy default configuration file
     cp /config.json.save $MM_CONFIG
     # Substitue some parameters with jq
+    jq '.ServiceSettings.SiteURL = "'${MM_SITEURL}'"' $MM_CONFIG > $MM_CONFIG.tmp && mv $MM_CONFIG.tmp $MM_CONFIG
     jq '.ServiceSettings.ListenAddress = ":8000"' $MM_CONFIG > $MM_CONFIG.tmp && mv $MM_CONFIG.tmp $MM_CONFIG
     jq '.LogSettings.EnableConsole = true' $MM_CONFIG > $MM_CONFIG.tmp && mv $MM_CONFIG.tmp $MM_CONFIG
     jq '.LogSettings.ConsoleLevel = "ERROR"' $MM_CONFIG > $MM_CONFIG.tmp && mv $MM_CONFIG.tmp $MM_CONFIG