Update run-opensim.sh to load os-secrets for DB initialization.
Rename OS_BRANCH to OS_GIT_BRANCH
Rename OS_REPO to OS_GIT_REPO
Eliminate OPENSIM_USER and OPENSIM_USER_PASSWORD from os-secrets as they are not used.
Make CONFIGKEY optional since encrypting secrets is now optional
Mount container 'config' directory as external 'config'
Change name of SQL database file to "opeinsim-sql-data"